Do u think my ex BF with BPD generally want to be friends?

Hey guys,

I just wanted some advice really because I don't want to be too vulnerable to my ex if has bad intentions. I was with my ex boyfriend now (He has BPD btw) for around 3 years.. on and off! We both get on really really well but because of the amount of arguments we had which always involved insecurities, anger etc I broke it off. we were running around in circles for so long! Anyway I am Bisexual and I am now in a new relationship with a girl. My ex (W/ BPD) didn't speak to me for a few months before that. I can't help but miss my ex, not as a lover but as a friend. We both have similarities & a connection because we've been through a hell of a lot together in our teenage years. I saw him again for the first time in months, I bumped into him on the street. We spoke about our current life and I told him I had a girlfriend. This was an obvious shock to him as he thought I was straight Indenial me but he seemed okay with it, bit jealous though but that's normal we chatted etc. He then started calling me a little asking me if I wanted to hang out with him. This was always when he was high! Always. I received a phone call a few weeks ago with him crying down the phone to me telling me he loves me, cares about me but hes really happy that I am happy and that its really difficult for him to be able to say that to me because of the way his head works. He asked if we could be friends and if he could hang out with me and my girlfriend ( I found that a bit odd) but saying that I am pretty free spirit and I don't feel like anything is 'normal' so if the circumstances WERE okay and I could hang out with him with my girlfriend I would but ye I doubt that could happen. I know I've never wanted him our of my life, that's why we were going around in circles for years. I saw him again yesterday (Christmas day) Me and my girlfriend went to a party and on our way back bumped into him. I walked away because I felt strange & my girlfriend waited in the car while I went to get something. Anyway I came back and my ex was in the car with my girlfriend. I was like D: anxiety alert. I walked in the car and he said he wanted to meet the person that was making me happy. He had said to her that I mean a lot to him, we should hang out some time and hes so happy that I am happy!

I am really confused by this guys! I think theres a part of my head that's being vulnerable and thinking he's generally happy for me & wants to just be friends because that's what we should be and then theres the realisitic part of my brain saying hes probably just broke up with someone and searching for some attention from me! I obviously don't want to believe that though so I thought id get some advice from you peoples.
Do you think he could generally be happy for me & want to be friends?
Or is this some kind of way of doing something bad? I hear so many things about the way people with BPD heads work. I don't want to be all stereo typical though eh! Its not right I know

THANKS
xx
*reads* GOSH I am bad with writing paragraphs, My vocabulary is a tad fast pace. I apologize

This just my opinion, but I've found it hard for pwBPD to have friends because they can be soooo jealous of your relationships with other people.

My BPDH gets very jealous when a close friend does things with others. Heck, my H gets jealous when our sons do things with their SO's!!! Will your BPD exBF be jealous if you have commitments with your new GF?