need help!

I need help guys. For real like someone to talk to and help me. I think my fiancé is cheating on me again. Like every time I get up or go near him he is closing something on his phone or just turning it off. And it seems like he doesn't want me around him like when he is on instagarm live he will have it so that I'm not seen in it. You should see the girls he has on twitter. I know I'm not that pretty and all but I deserve better. Also when we found out we had another miscarry and I'm still bleeding he keeps waiting to have sex and he knows I'm hurting and he asked at least 5 times a day if I've stopped bleeding yet. Like what the fuck?. But if anyone wants to help or just talk to me I know you can't give out numbers on here but you can look me up on Facebook ( Brittany Greene). I know it's probably childish to wanna do this but what I need help with is someone message him on twitter and see if you can get him to send anything or something. I just wanna have proof you know. Like so he can't say that's a lie or that I'm just overreacting or just say it me. Please guys I know this is probably stupid and childish but I just need proof. I love him with all my heart but I don't deserve this and he sometimes makes me feel like I'm not pretty or smart. I know I'm not the prettiest girl.