How do i know if my ex is seeing someone?

That question ate me alive for 8 months of my life.

I know how that feels. It feels horrible. You should try to be friends with him. JUST FRIENDS. Then, after a while, when you and him are really close, you should be like, say his name is bob. You should be like "Bob, I know we don't really talk about it, but since we are close and all I feel like I can tell you anything" or something along those lines. Then you should be like "Bob, in our relationship, do you think anything went wrong? I mean like, do you still care or what?" Then if he gets really quiet he's thinking. And if he says he cares, take the conversation from there, and tell him how you feel. If he says he don't just as friends. Say something along the lines of "i was just wondering. since your so sure and everything sorry i asked" But that's all there is to it. Its alot easier than it seems, but, you just have to be ready.