Emotionally drained please help

So I was sleeping after a long day of college classes and my bf called me I answered and after about 15-20 minutes of talking he said hold on real quick because he had to talk to his brother so I did then he went out to his car and said he was going to sleep and he will call me at 7 so me being me I jokingly said” but I don’t want you to go” and he said he’s going to take a nap and all the sudden all I hear Is “shut the fuck up” I asked him who that was even though I knew it was his friend but I wanted to make sure and he kept on saying is “nobody it was just me” literally lying to me even though I know is not him then his friend tells me to shut the fuck up again and calls him a pussy so of course I get mad because his druggy alcoholic friend is not going to disrespect me my bf yells at me on the phone gets mad at me and says I’m very annoying and annoying him and that he started this conversation I didn’t start the conversation even though I was sleeping and then says he’s going to put his phone on silent so he doesn’t see any calls or texts from me and hangs up the phone

I was so hurt and me being 29 weeks pregnant I started to cry under my covers

He’s such different person or “fake” when he’s around his friends I don’t know what to do

He is 23 years old btw