I’m so hurt

Me and my bf broke up two weeks ago he picked me and our son up a week ago to spend time together as a family for our son. I stayed at his house for 4 days the last day I was there I had seen on his iPad him and his brothers messages and the night before I left his brother told him to meet him at this restaurant and that there were bitches there and he could get laid just remember me and our son are at the house he plays off an excuse saying I think my brother needs a ride. He was fucking me all the days I was there making it seem like we were getting back together and fixing things our son is only 8 months. I confronted him about it and he’s like see this is why I don’t wanna be with you you always assume shit and try to fight with me. He would cuddle me we’d watch movies and we’d have sex he was only using me to shove his dick up something...