What should I do?

You love her so much, ok. But if she's talking with her ex all the time she's not in love with you. Even after her ex moves, doesn't mean she won't be searching for someone else.

'never did anything sexually', sorry, doesn't matter. She's wandering and your setting yourself up to get hurt.

What u need to do is tell her he needs to lay off now or you will need your space you dont deserve to be toyed like this.. its not fair you need to talk to him like a man and say look its over with yall give up and make her tell him she is DONE with him.. you know. its not cool for this to be going on man good luck,,,

Obviously she doesnt love u the way u love her....she still wants to be with her ex...if her ex was to say lets get back together she would go without hesitation...U should just let her go i know its not goin to be easy...but youll be ok...

You had only been going out for 5 months? How long did she date her ex? Maybe she wasn't ready for a relationship when you began to go out. And this ex... what a jerk, no integrity, and does that mean to your girl friend or cant see that in you? Is that what you want from a a relationship?

there has to be a reason that they are talking. even if he moves away like he says he is and they both say that they have not done anything and you feel that they are telling the truth then i would not worry about it. but then agian my ex was doing the samething, the only difference was that i walked in when she was sitting on the couch and he said she was there to see here kid, but she only cam over when i was at work and no other time. Then he came home from work one day and tld me that i need to go and i have never talked to him since, except in court we have a child thathe never sees together?

Well if she loves you as much as it sounds like u love her then tell her that she will have to end it with her ex. I mean no should you go around choosing whom she should hang out with and talk to no, but an ex is diffrent I mean it is not the same thing as a old friend they had a lover type relationship that always has that chance to re-spark If it wasen't causing any harm to your relationship then big deal but obviously she was keeping it from you for a reason right? And he felt the need to tell you why? He wanted to cause problems ? I mean I dont know but why else? She is trying to make it up too you well if it was all innocent what would she have to make up? So if she can't leave it alone for the sake of your relationship you have together then he must be important. Just if you do tell her that and she gets mad about you telling her who to be around then just be honest tell her how he makes you feel and tell her that you want it like that because you love her and its putting to much stress on the relationship. If she says yes and goes behind your back then somethings up ya know. It all adds up too how much she loves you!!! She goes behind your back again look somewhere else!! Just suggestion Good luck!!

There is nothing wrong with your g/f having a friendship with her ex. Obviously this person was a big part of her life at one point and just because they're not together on a romantic and or daily basis, it doesn't mean that she has stopped loving her ex. Love comes in various forms and and when one person comes into her heart it doesn't mean there isn't enough room for those already there to have to leave. She's with you now, most likely because she wants to be, if she has a choice, which it seems as if she does, she has chosen you. Appreciate her for that and let her love all she can.