My boyfriend say I'm snapping all time but he not the same any more I think he is cheating how could I find out??

Sounds like it is time to move on, dating is when you are finding out about the other, if you don't trust him, he has no way to prove he is not cheating, and there is no fool proof way to prove he is ( unless you catch him)

If you think he's cheating then I don't see much trust between you. As Father Chuck said this relationship sounds like it's over and it's time to move forward.

It takes years to build trust , but only suspicion to lose it. I don't see any future in a relationship without trust.

If you don't trust him I think you really need to re-evaluate your relationship with him.

Why do you think he is cheating, and is that why your snapping??