How do I chose between my current boyfriend and my ex-boyfriend?

This sounds like something you have to look in your heart and be honest with yourself about what you really want to do. You also have to think how this is going to affect all three of you.

Personally, in my opinion. I say if you like them both equally, stay with the man your with. You old boyfriend left ( it may not have been his fault, it sounds like it probably was just circumstances) and you two broke up. This guy has done nothing wrong, and has not left you to move away. If you and your best friend are meant to be it will happen eventually. Same with your current boyfriend.

I say do what you really want to do, but be responsible and tell everyone involved the truth no matter how hard. (this includes being honest with yourself) And understand and accept the consequences. (like maybe if you break up with your current boyfriend, get with your ex and he moves again and your last boyfriend ,who did nothing wrong, doesn't want you back.)

If all things are equal, I say stay loyal to your current boyfriend (deep down both men will respect you being loyal too). And let what is meant to be play out.