She manipulated me and I'm hurting badly, please help

I was in a relationship with a girl about 6 years ago, we were only together for around 4 months and things were going well until I found out she was engaged. One of my friends found out and when I confronted her she denied it but I found out it was true after seeing him on her social media so I deleted her off everything even though she tried messaging me just before her wedding. She eventually ended up getting divorced a year in to her marriage, that was around 4 years ago. Around last year we got back in touch and we got back together as she seemed to have changed a lot, but a while in to the relationship she revealed that she did have quite a few boyfriends before then and that she had slept with someone. I was understanding and things seemed to be going fine after and we even planned for marriage, but then I noticed how much of a rush she was in to get married and how she said she always misses me. But lately we have argued a lot and she has really wound me up to the point where I didn't want to speak to her, she knew I wanted my space but to get my attention she ended up blocking me off everything. When I asked why she blocked me she said she didn't want me to have access to her if I can't commit to her, even though she has a lot of random guys on there! She eventually unblocked me. My own family wasn't happy about my relationship as my mother wasn't keen on her but I eventually persuaded her to accept (I realise now how stupid I was). A few months later, I noticed her being open again about other guys but instead of saying anything I stayed quiet. Because there was a guy that she used to talk to that got in touch with her, he was actually a married man so I don't know why he was reaching out to her but what bothered me the most was that she would complain about him getting in touch but she never blocked him to stop him from getting in touch with her, it felt as though she liked the attention. When she asked why I was quiet, she insisted that I can talk to her about anything so I told her that I wasn't happy with how open she is with other guys, she then went on to say how she didn't want to be with someone that is insecure as her ex husband was the same. I was quite annoyed at this point as she has said herself in the past that she is insecure too and she always had mood swings and emotional issues due to her endometriosis which I was always understanding of, it hurt that she couldn't be understanding of my mental health. So then she went on to complain about me not committing to her, at this point I had enough of it and said that if she wants to end it she should do it now so she went ahead and blocked me off social media. She didn't block my number but now I have blocked hers so she can't get in touch with me. I told my mother that we had broken up so she shouldn't get in touch with her mother to sort wedding arrangements, at that point my mom informed me that she rang her mom a couple of weeks ago but she said that she was busy and and that she would ring back later which she never did. I was tempted to unblock her and have a go at her for saying that I was the reason things weren't progressing. But I though forget it, I no longer want anything to do with her anymore. Its been over a month since she blocked me, I have missed her a lot and was tempted to try to get in touch with her. Im hurting so bad but I am trying to get in touch with her but I know deep down there's no point. I noticed today that she has now unblocked me on social media. I don't get why she would unblock me especially when she was the one to cut me off first. What should I do?

below are just my opinions:

I was in a relationship with a girl about 6 years ago, we were only together for around 4 months and things were going well until I found out she was engaged. One of my friends found out and when I confronted her she denied it

being in a relationship with u and being engaged with someone else at the same time is a huge thing. whatever explanation she has for it, she shouldve told u before and upfront rather than waiting for you to 'catch' her and then seek an explanation.
this is a huge red flag. such people are very big manipulators and one cannot win with them in a war of words.
there are two possibilities when she explained her past to you:
1) she is further manipulating and lying to you
2) she has genuinely reformed and has remorse.
if you think it's 1) then leave the person.
if you think it's 2), even if she has genuinely reformed, it's not your job to look after her and nurture her and befriend. she can date someone else. you dont have to hate her, but its not your job to give her a second chance even if she has changed. if she has changed, let her find someone else to give her a chance.

Around last year we got back in touch and we got back together as she seemed to have changed a lot, but a while in to the relationship she revealed that she did have quite a few boyfriends before then and that she had slept with someone. I was understanding and things seemed to be going fine after and we even planned for marriage, but then I noticed how much of a rush she was in to get married and how she said she always misses me.

whenever you want to know the truth about someone's intentions, that someone is the last person to ask to. her actions speak louder than her words. you may feel sorry for her, but sorry i think she's manipulating you. like a predator and you will fall for it, cause she has mastered the art like all predators too.

When she asked why I was quiet, she insisted that I can talk to her about anything so I told her that I wasn't happy with how open she is with other guys, she then went on to say how she didn't want to be with someone that is insecure as her ex husband was the same.

well it's one thing to not want to be with someone and another thing to block someone. one moment she was desperate to marry you and now she's blocking you. i think she's just trapping you.

at that point my mom informed me that she rang her mom a couple of weeks ago but she said that she was busy and and that she would ring back later which she never did.

she doesnt care. she wont reform. she wont change. but you have to otherwise you will fall into her trap again or someone else's trap. never ignore red flags in any relation.

I was tempted to unblock her and have a go at her for saying that I was the reason things weren't progressing. But I though forget it, I no longer want anything to do with her anymore. Its been over a month since she blocked me, I have missed her a lot and was tempted to try to get in touch with her. Im hurting so bad but I am trying to get in touch with her but I know deep down there's no point. I noticed today that she has now unblocked me on social media. I don't get why she would unblock me especially when she was the one to cut me off first. What should I do?

i think you should find new friends, focus on your career/studies, health. if she misses you, she can make the call. you dont miss her. you miss an illusion of her which she had created to fool you. yeah it hurts. but think of the red flags. even if she comes back to your arms, how long do you think before she starts off again and blocks you.

i know it hurts a lot. but for the sake of yourself and your mom, you need to let her go and let yourself go. i still miss my old friends. they werent as toxic but they still werent good for me. it hurts so bad. i miss them but i dont crave to call them anymore as i know we're better off without each other.
getting in touch would make more bad memories.