I think my bf is cheating ( sorry for the long post )

I’m 22 years old and I’m 31 weeks pregnant due to have our baby boy October 17th. So me and my boyfriend were ordering food off the door Dash and he gets a text message with a girl named Jayda. I didn’t click on it but when he grabbed his phone back he was like man what does my bro want and I know I saw it was a girl name I didn’t look at it I should’ve but I didn’t. So like he’s a gamer so when I go in the room he has his phone down I see that he’s been texting her like every day and the day of our baby shower August 7 he was texting her and It had red hearts for a message I didn’t read the message because he moved his phone so fast. Actually prior to August 7 August 6 he went to go get a haircut and then he went all the way to Centreville Virginia mind you we live in Maryland he lived his whole life in Maryland all his friends are in Maryland. he doesn’t know anybody in Virginia so I already thought that was off so he said he’s on his way back home and I had to call him because I was just trying to see if we could borrow some thing from his mom. he sent me to voicemail twice and then the other two times I’ll call he just let it ring but he was texting me like a minute before this. he said he left his phone in the car and he had to stop somewhere to look at something for our son. I knew he was lying but I didn’t know who he went to go see. I just had a gut feeling it’s a girl but I didn’t have proof so one day I was just I just searched his name up on Facebook we don’t even follow each other. this girl Keira pops up because she tagged him and come to find out he went to go deliver her a Hennessey bottle and they are acting flirty on fb. She’s tagging him saying she wanna be somewhere tropical taking shots and dancing with him & he hearted that post. and I’m like if she means nothing and she’s just a friend you would’ve just said that but obviously she means more to him than just a friend that’s why he didn’t let me know he was going to see her. I have no family to go stay with , we moved in together over a year ago. I work part time and lost my good paying job due to Covid so I’m stuck working this job 2/3 days a week only making enough to pay my bills. I tried getting a better job but no one will hire me due to pregnancy and obviously they didn’t say that but I know that’s the reason. I feel stuck and now I have a child to worry about. I always wanted a one household family but that’s ruined.