Lot of people have commented on this already so I might be only repeating what has already been said. I say leave your current boyfriend, and dont even think about talking to your ex who couldnt call/email you when you still loved him. Thats a bad way to dump someone and everyone in US is busy..but they have their priorities. Its to to accept it, but you were not his priority at that time and you are not one right now. Next time you talk to him, tell him you have found a nice guy and you have moved on with your life. And reading what you have said about your bf, looks like you are still looking..not ready to settle. I think going back to your ex will be a really bad move so you should take a clean break from relationships for sometime. Think about what your future partner should be like..what you can compromise on, what you absolutely need and go for it. I think you are ruining your current bf's life by staying with him when you are not totally comitted to him. The rule I follow in this kinda situation: when you have a doubt, dump it.