His ex (babymom) pregnant again by him!

My boyfriend of 3 years and I are expecting our first baby together. I posted it on Facebook last night since we are passed our 2 trimester. I received a message in the request box. And it was from his bm. She must’ve stalked my page and told me he’s been cheating on me and is pregnant too. 3 months! I was furious and didn’t respond. I confronted him about and he said that he did slip up a few times when he would go visit her house to spend time with his son. I’m broken hearted and uncontrollably crying. I just left out this morning to stay with my mom. I wondered where I kept getting reoccurring Bacteria Vaginosis from. Ughhhhh I just wanna end it all

Edit: EX BOYFRIEND. I’m nobody’s fool to stay with a person like that