Am i being manipulated?

hello world! please help me out,i know it's going to be long but please read. there is a girl in university i like her a lot we have been friends in fact great friends since june-12 (had couple of courses together, than we used to enroll same courses to make sure that we stay together) i started to feel for her but she told me that she had a BF and she loves him, i obviously gets on side, all keeps on going we stays as friends, she keeps dating him and in fact keep telling me about her dates and i had no option other than to listen and hurt inside. in feb-13 she broke up with her BF ( he was wrong he used abusive words for her, all happened in front of me) and all ends b/w them. it happens like this that she keeps to cry on my shoulder daily, cursing her fate, looks, personality and i keep her pampering her cheering her up, after a month i told her how exactly i feel for her, she didn't said NO and asked for some time we met, discussed it a lot, precisely her answers were: i like u, you're a perfect guy, i am used, i don't deserve u, i had big past, though i want a guy like u in my life as a husband because u understand me like myself etc..then i said what's the issue say yes and forget past, she said y didn't u said that all earlier, etc.. i asked if i am forcing u tell me, i won't say this again she said if it was like that she wouldn't have came to meet me here ( we were at restaurant)..after couple of days she said i am not ready, afraid of being hurt again, i don't want emotional attachments, because i get involves deeply and i will never know when anyone will leave me, i assured her a lot but i think in vain. PRESENTLY we are good friends, last week she asked me to pick her up i went she was with her mother, n her mother knows my name i think she told her all, after that i sometime pick her up for university then sometime drop her too, we both sit, eat, talk together chat, call , sometime in our call conversation we hit the same topic then i in flirtatious way say things again and she either take my words like i m so lucky to have love like this but then silence....etc.. or sometime change the topic. another thing now she get angry with me so easily like i did a nominal mistake and she starts to fight, i had to sorry then later she apologize thrice or more that sorry i was wrong etc, anyone in fact her girl friends says something she comes to me even i don't know the person tell me whole scenarios though i am not interested in listening girls talk etc.. on her birthday some of our mutual friends made fun of us like we are having a secret relationship etc and she gets very angry on me not on event but on texts and said very bad things to me and i literally felt that i am sign of embarrassment for her then later she told me that their was a serious family trouble plus she was annoyed with friends behavior that y she said and apologized like thousand times and was crying i said if u want me to go away i will and will not let u feel my presence even, she said no i don't ever, i am not embarrassed of you etc..and all gets fine after a day, she is being with me in front of same friends so she is sticking to her words that she is not feeling bad in being with me..i don't know whats this...we are having summer courses registrations i said i will take different courses she said so i will be alone? etc...then today we talked and decided to take same courses again. I want to ask i can't tolerate this i can't live with this hope, so please tell me is all over? any chance? should i stay with her?
is she really unsure of me or need time?
or i am just being used by her as she knows i love her a lot
....sorry if grammatical mistakes

Are you being played...the ultimate litmus test would be how she reacts if you tell her you r romantically inclined.
(1) if she was sympathetic, but honest, telling you plainly that it's not that way for her, then i would say she is a worthy friend. You will have to take responsibility for dealing with the unrequited love...sorry, but it happens.
(2) if she reacts with fear or disgust this might be an indication that she suspected that you wanted her but she silently lett things ride, hoping that you got the message as painlessly as possible that she easnt into you romantically. But be aware before you confess, unfortunately this is the kind of response that often precedes a total breakup and termination of contact.
(3) if everything continues as before or if she becomes flirty but elusive, then you are getting played.
In that case, back off and see what effect this has. Also, find some other women to hang with...

Everybody manipulates everybody else. It's part of being human. We let other people manipulate
us because it makes us valuable to them and allows us to use that to manipulate them for our own interests. You do what your boss and teachers like because it gets you a pay off. It works the same way with our friends and romantic interests even if the pay off is different. If the pay off you're
interested in just sex masturbate because it's the safest sex there is and the only thing you don't
get out of masturbation you need sex for his having kids. There are 25 million people so far who
have died of AIDS since the 1970s which is more than everybody who died in the Vietnam War
on both sides. Guys today need to get out of this stupid Hollywood mental programming that they
need to be some sort of Rock Hudson stud to prove their manhood because Rock Hudson died of
AIDS and nerds who go to college to train for professional careers instead of trying to pick up
hot looking girlfriends end up making a lot more money when they graduate. You don't need to
have sex with somebody to be their friend no matter what their gender. Friends are good. You
need as many of them as you can get but you only need to have sex with somebody you want
to have a family with unless you plan on a career in the prostitution or pornography industry.

It sounds like she likes you at the very least but is afraid of getting hurt.
I would suggest directness. Tell her you want her.
Women like assertive men. If she tells you directly No, you'll know and you won't be in this limbo.
But from what you say it seems that she just needs a little nudge, be romantic and sweet but take what you need before a new boyfriend comes along.