Just need to rant...I need friends!

I just need to rant so bad so I just found out one of my friends is texting my boyfriend and we are expecting a baby boy and she has a baby and is living with her boyfriend but idk if they are together she says they have problems but whatever the thing is what is like kinda pissing me off is he never told me he was texting her and she hasn’t told me they are texting... okay that’s all aha I mean i don’t know I lowkey don’t trust her and I kinda don’t trust my boyfriend he is always so nice to people and even when it comes to girls and I want to ask to see their messages but I feel like he is just going to get mad and all that but yet if they aren’t talking about anything bad he would just show me because that would prove he isn’t hiding anything...I don’t know what to do.