LOOKING FOR HELP WITH BOYFRIEND

Hii so I need some major help if I should break up with my boyfriend or not. I do love him but I think it's time to put my happiness first and not torture my self anymore. He lately seems like he's cheating only because he has a massive guilty look. He's being extremely blunt to me and not caring what I'm going through. I recently got verbally abused by a house mate and he told me to "chill out" and "that its okay". Also during that day he had never once asked me are you okay? Or how's your anxiety. (I struggle with severe ptsd , anxiety and depression). I'm really stuck and there's a range of other problems that's been going on between us. He will make me feel bad if I don't wanna have sex, he will make me feel even worse if I dont feel like getting high. I'm not big on drugs. He gets a message from one girl in particular and we will call her "a" . A will message him and say some pretty strange things and he will always hide the message. He goes to her house constantly including at night time. I had once found a used condom in his bag and when I confronted him he stuttered and said it was ours. It was bull shit because we hadn't had condoms for weeks and he also had no other non used condoms with him just that used one. I do apologise if this is a long story I just need some guidance and I'm really stuck.