Rite,so about a month ago back in November, I ended up having to break up with my girlfriend when we had been going out with one another for 2 1/2 years. It was hard for me to take but she said that she needed time to get "herself sorted out". We keep in touch because she says that she would get back together with me by the beginning of next year.

However I find out she is eventually talking to a lot of guys in a flirty way and its having an affect upon me. I tell myself I should just forget about it but I don't see that happening. It hurts when I find out she is talking to me about her friends who say they are going to meet her and her friends and they can't make it either because they have people that are more important to see or they are too busy.I also have to say that a majority of her friends are boys but I have argued about this before and managed to sustain the uncomfortness inside, though I've never had a chance to meet most of them.

Although I don't go out with her, Im still strangely holding onto the glimmer of hope that we can get back together,because this honestly is my first love and its hard to take the loss. I just want to know if there are people who have suffered a similar situation and how they dealt with the situation.

I'll state this clearly as I am crazy about this girl and we always had fun with one another.

IMPORTANT
I have just found out that within this time she admits to having gotten off with another person and that she found out that this person also had sexual intercourses with other people while she was "seeing" him so to say but I don't know how I should approach this. As I've said I really love this person and I believe that what she did was not exactly cheating as we were never going out. So Please help me out here I duno if Im clinging onto a false hope or Im just stupid.

Well, from a girls point of view, I would say.. that 2 1/2 years is a LONG time. So you need to trust that she really does love you.
You can't fall "out of love" that fast.
So, maybe she'll have little flings, but you need to trust that you know her and you know her heart.
Things will work out.
Give her space, and then, she'll come back.
I promise.

We all have been through that first love break up. The best thing is to have your own fun, and let her have hers, and see what happens. She wants to explore this big ole world she finds herself in. Its called growing up, and finding yourself. If you weren't so worried about her, and more about yourself, you would be doing your own thing too! I know your so in love, but now is the time for you to grow and know how to deal with your own feelings, and not be stuck on them. I am assuming your both very young.

Thank you and you're right, I should go on in life and stop being haunted by the past, so to say.