So emotionless

I'm 13weeks preg just saw my so emailed personal ads of craigslist to meet up with people for sex I have no clue if he went or not. How to bring it up he will instantly get defensive and leave and not give me answers I want I'm sure. I'm just so done feeling like I'm not number one in his life I'm emotionless about this and now we are having a baby 😕 I want the best for my baby. How do I even go about bringing to up