My ex boyfriend is travelling and we are talking but i don't know if he still loves me?

My boyfrined and I borke up because he went travelling we stopped talking for a while so I could heal and be ok. We started talking again and i have been telling that I have been doing stuff and instead of wish he was home i tell him I think he hsould travel until he wants to come back and have heaps of fun, I don't think he likes that I am happy that he is having a good time. but he is a jerk and sleeping with girls and bragging to his friends and stuff and he said he didn't want to be single to sleep arund, it was just because long distance is too hard etc. but he has been fooling around (as you would) and thinks I don't know, and I do. But I am not letting on. But I am being reall casual which isn't normal for me, he is used to me doting on him and treating him like a king and now I am just chilling and he started writing emails where he is acting too cool and as if he is realllly busy but I don't know if it's because he is worried i'm moving on. he is acting like he doesn't care about me when I am telling him stories about people i've met even boys even though they are just friends. But he hasn't replied ot my last email and it has been two weeks and I know he has the internet. I don't know what to do... please help. If he really loved me why does he always do this. Why can't he just chase me for once, but do I always have to chase him... SHOULD I contact him again... or just wait and not email again... ??? BOYSSS???