Your input have really helped me Thanks guys...
And sorry, but the last thing is revenge i'm not a vengeful person and i'd simply move on.
Even tho she is making it harder for me since he calls me from her boyfriend's and tell me that she loves me still...She does, me too but i simply cannot let this happen and i have to move on.
Cheating on me what is something unforgivable for me...
What others said, deal with it basically.
Don't ignore it. Don't forget it.
Deal with the fact that your now ex-girlfriend cheated on you.
Find out why if you can, it'll help in the end to know why.
Things will get better over time but that's through actually dealing with it.
Ignoring it just leaves it sitting there, waiting to go hi hi when you least expect, or want, it.
As you said, cheating is something most people won't be able to forgive, it's a complete betrayal of trust.
It might be hard to see your good times as good as you may not believe her etc but trust that at some point, you made each other happy. If she says she still loves you then clearly you meant something to her, so never worry about that.
You are a person, with good parts and bad parts. One way or another, she lost all those parts and you lost all of hers.
You could not have done anything differently, just as you can't do anything differently than you will do in 10 minutes from now. You will do what 'you' will do. Much like you did what 'you' would do 10 minutes ago.
Regret is denying yourself.
Try and deal with the past without obsessing over it. No doubt that'll be hard but it's pretty much the only thing you can do. Just looking to the future is just ignoring that chunk of your life that you no doubt enjoyed.
All in all, be yourself. Be confident in yourself as a person. Hard to do no doubt but remember to be confident in your faults as well. We aren't perfect and sometimes our faults can cause problems. People's faults will cause problems at some point or another. Accept those faults and you should be able to get ahold of yourself.
Now I feel a bit sheepish for being sentimental.
Boobs. That's it restored. Still meant what I wrote though.
First of all, no matter what, if you know about it, you should confront her.
After confronting her you can either:
A: Find out what she has to say for herself and choose to forgive her and try to make things work.
B: Not accept whatever she says, and break it off with her right then and there.
OR
You could try to sweep the information under the rug and forget about it, but one way or the other, somewhere down the line, things will go south either way.
I personally would do, and have done the other things I suggested above. Sometimes "A" works, and sometimes it doesn't.
Ultimately it comes down to how serious you are with the girl you're with.
If it's pretty serious I'd say it's worth trying to salvage, but that's me.
Forget about her and move on. Don't take her calls, especially when she calls a month or two from now saying how big a mistake it was. Don't, simply move on. Girls are cruel, deal with it. You now know the simple truth of female hypergamy. They are always trying to find someone better and only realise their 'mistake' after they have committed the act. Either deal with the fact of life that you will be cheated on countless times or try to find a woman who actually controls her fleeting emotions and stick it out with her.
And never, ever allow a woman control of your heart. Always be prepared to drop her at a moments notice, without a second thought. If you do that, you won't feel nearly has bad next time a girl cheats on you.
To forgive means to let go of the malice and anger. It does not mean that one must be a sheep and let the behavior which caused the damage to repeat.
It is possible to forgive someone and still keep them at arms length to protect yourself until trust has been reestablished. And even then, forgiveness does not require that things go back to the way they were before.
If you do not forgive, you do not move on. You sit and fester like a wound that was never cleaned. And it will kill you, slowly.
I said what I said. You don't need to forgive the other person to move on. The only person you have to forgive is yourself.