Everything isnt what it seems

I have changed my bio from ttc to being single. Me and my ex decided to just go our separate ways. I am heartbroken because of how things ended. I found out that he has been sending pictures to other men. Nude pictures of his penis to other men. So it all started when I received an email from amazon for downloading the chat and text app called "kik" so I asked him why he downloaded it and his excuse was "I only downloaded it because you did" my reason for downloading it was because I'm in a group chat on there but I havent been on since I had my son. So lately he has been complaining about us not having sex this was before I found the Nude pics from yesterday. So last night I asked him did he do it because we weren't having sex and he said that could be the reason. He keeps making excuses and im sick of it. I had just decided to leave him after I found out he was doing this. He told me it wasnt any of my business on how he gets money to take care of his kids so i told him if me and you were together you wasnt suppose to be doing anything like that. he claims he's not gay but i refuse to believe that. I wondered if i was enough for him but i guess you cant be enough for someone that doesnt want you. Im still trying to wrap my head around the fact that he did this to me. 2 years down the damn drain and i know 2 years may not seem like alot but when you've given your all to someone it seems like hell of a long time. I just dont know what to do but i do know that i want nothing else to do with him anymore. we have a kid together unfortunately I still have to communicate with this clown. I feel alone and confused but hey life goes on I guess