Cheating bf I need help please

So my boyfriend and I have been together going on 3 years on and off , we’ve had awesome times and very bad times were violence comes in. So before us he was married , he told me he cheated on his wife but because certain reasons and I should of still known it was not ok, well he swore up and down he would never do that how he’s so loyal and could never do that to me. Well last night on my bday surprise he surprised me with I got a message from a girl he met on tik tok, I don’t want to post the actual messages but he tells her if she’s down , if she wants him to get a hotel room for them so they can hook up . Which he tells her I have a girlfriend and you have a boyfriend so it would only be a hookup right and she said yes, so he kept on about the room and how he first seen her he was hooked , told her he would get the room sometime this week during the day and she’s only 3 hours away. I’m so broken hearted I know I’m not working right now but I’m at his house where I live and have lived cooking cleaning catering to him literally. We fight every single day if it’s he starts or I do. It’s every day something. I love him so much but I don’t know what to do. He texts me saying I’m sorry but if our relationship didn’t suck I wouldn’t have tempted to. I think that’s crap and an excuse. I don’t work and have a almost Broken down truck , in his text this morning too he said oh in case you wanted to leave I left $60 for gas. What should I do? I have no where else to go. I’m not working still waiting on us to do our income tax I have from last year. He is now texting me blaming me for being shady in the beginning Of our relationship and how I was in the streets lying to him . Huge difference trying to fuck someone compared to going out. Please help me