Caught boyfriend texting another woman

Long story short I caught my boyfriend asking another woman for nudes and telling him he wishes they would’ve got married. About a week later, I found out I was pregnant. I stayed and chose to forgive but sometimes my decision eats me up alive. 6 months have passed by since then but sometimes I still break down and cry by myself. Today, I chose to let my feelings out to him and tell him that it still hurts me and that I can’t help but feel paranoid that he will do it again, especially since I’m pregnant and my body is changing. He told me that he’s doing his best to prove to me he will never do it again and he said “Atleast it wasn’t physical” and that “some men do much worse” I told him I get that but it hurts me. He got mad and started arguing with me and we went out to dinner to try to act normal but he wouldn’t even talk to me. After dinner I went to my moms and when I came back he is sleeping in another room. I just feel done…I’m sad. I just needed to vent.