Is this girl just screwing with my head?

[Adam]

So me and this girl are dating... or WERE dating.
We are broken up now but I am still talking to her on a daily basis.

So a long story short, here's what she has done.

She dated this guy for two years but while she was with him she cheated on him with me.
After a while of seeing each other behind his back she stops talking to me out of no where
and leaves me for him.

It didn't bother me so I carried on. Then, she breaks up with him because she said she wanted me instead.

So me and her continue where we left off.

After a month or so of dating I got curious and looked at her phone while she was in the bathroom. Sure enough, he was in her inbox. So I opened it up and read it. She was sending him messages about how I am just a friend and that she plans on getting back with him after the summer is over. So Im pissed and I confront her about it but she tells me she doesn't want him and was only telling him those things to get him to leave her alone.

So I ignore it and carry on.

Sure enough, curiosity kicked in again a couple months later so I went and looked at her Twitter page.
I clicked on her 'Favorites' and sure enough, she was Favoriting his tweets (possibly thinking I wouldn't see it) after telling me those things. I confront her about it and she apologized.

So NOW she tells me she no longer wants him and that she doesn't talk to him anymore. Its been 3 months since the last incident ...but then I find out she's been texting him behind my back and lying about it. I don't know how long she had been doing it but I knew she was. So I couldn't take it anymore and broke up with her.

About 3 days after the break up, I call and ask her a few questions. I told her I already knew the answers so that she had to be honest with me. I asked her if she talked to him any more after we broke up and she said yes. But then she kept reassuring me that she didn't want him and that she is sorry for what she did. Soon after that, I find out she went and followed him on Instagram the day we broke up. Messed up right? So now we are on hiatus. I am debating on what to do. She clearly still wants him even though she says she doesn't. What in the world do I do? May I remind you, when we were together we were with each other all day every day. She seemed so happy with me but is this just a hangover from a long term relationship from her?

Also, she is a senior in High School and he goes to the same school as her so they are probably seeing each other in the hallway everyday. I graduated a year ago. Do you think that will contribute to this?

Any advice is great. And if you are going to be rude then don't bother commenting.

Do I just leave her completely or just move on with my life?
I think I already know the answer but I want to hear your input.

[Adam]

move on, she obviously can't make her mind up -.-

[tinkz11]

its never good when someone is constatnly lyin bout wht there doin especially when its wth the same person u know. if u caught her up one time wth him the ok i can see u just leaving it alone but since he is constantly there then there is obviously something there...my guess is she uses both of u guys for her own selfish reasons..she prob wants u cuz ur older and u can do more for her then he can and she uses him to get attention while at school...girls love attention and they will take it were they can get it..i sayu bounce out n find a new girl to be wth

[shay]

Seriously move on, the fact that you're even worrying about her shows that you're a great guy. Look for a nice girl and fall in love with her. I mean she is torn between the two of you and it will always be like that. sorry.