He says I cheated...?

I think what you need to do is break it down for him the way you did for us explain the whole story and include the part about her telling you she was trying to get with him too.... and tell him that its not cheating you weren't together and you would have been with him ages ago if he would have made the move... but that other girl cut in the ed him... its his fault for not stepping up to the plate! If he keeps being immature about it then hes not worth all the drama anyways... he needs to step back and see where your coming from its not fair to shove all this blame on you.