Iv been with a girl for a year and a half, got VERY VERY close, and tohught she was the one, only to find out EVERYTHING was a lie, she was cheating on me, constantly lying about it, only for me to find out that she moved in with him! Last thing she said to me was "I love you, see you tommorow."....im in so much pain its unreal, knowing those two are happy together while im picking my heart off the floor. How do i get over this as easily as possible? Any help will be appreciated

You won't like this but you can't get over it, like, NOW. Time is the only healer.
You can do a nice spot of revenge though.
Act like you don't care, make sure you have a damned good time doing what you enjoy and surround yourself with friends. Totally ignore any calls/texts/emails no matter how much you might want to reply, wipe her out of your life. Nothing annoys people more than other people not caring/ignoring them.
Also, on the bright side, you'll be so busy doing all these fun things that you'll not have as much time to dwell.
That's really the only answer.
It is shit that you're hurting and I hope that the pain fades soon, try and find a new hobby or two and whatever you are doing, don't drink for now. It won't help at all.

ouch that's gotta hurt, try and be dignified about it and avoid drunk communication, lessons in love as they say.

I agree with 8legs, just ignore her cause from what you've said, she isn't a very nice person anyway so the faster you're away from her the better!
Don't mope around in the house feeling sorry for yourself either.. get out and have fun cause that's what life's for

Hey and maybe karma will get back at her........
It's not the end of the world

Had a similar thing happen to me a couple of years back, sorry to hear it's happened to you too!

8 is right though, the best thing you can do is to ignore her completely, as hard as it may be it's the best thing for you now. If she contacts you and says she just wants to be "friends", my advice is to stay well back - you'll only end up getting hurt more in the long run =/

Your best bet is to find something to use as a distraction (games/sports!) ^^