I Need Your Help.

I have no female friends. My boyfriend and I have been together for 3 years, we have a two year old son and I’m also 4 months pregnant. I found out this Friday he has been speaking to two other females, trying to meet up with them, but I don’t think he had from what the messages say (they’re on Snapchat, only a few were saved). I have no where to go and all of my emergency money was recently spent on the needs of my car. I’ve been sleeping on the living room floor on a blow up mattress since Friday night. Being in our bedroom literally makes me sick. We don’t talk face to face because I’m pretty much like talking to a paper bag in situations like this so he doesn’t even try. But these are the messages he’s been sending me.

Before this, he was constantly on his ps4, he was so into social media and getting people to follow him. He wanted to look so good for the internet for some reason. We had a mild argument and he assumed that I wasn’t happy, but I was just going through things which I communicated to him multiple times. I wrote him a letter and told him I’d be the best spouse I could for him after the argument. And that if we wanted to make this relationship work, it’d have to be the both of us making a change and everything was great after that but then something told me he was cheating on me, so I went through his phone. At this point I’m just tired. This isn’t the first time I’ve left because of something like this but not to this extent. I love him and I wanted so much for this relationship. I won’t be leaving the apartment for a long while due to the fact we have a baby on the way and I have to prepare for that. I’m just so confused and I have no clue what to do. I want things to go back to normal but I can’t keep giving him an ultimatum, because it always goes back to shit. I just need advice.