I'm pregnant with baby number 4 and not married

Me and my boyfriend have been together for 14 years. He was married once before me. He was 15 and got a 19 year old pregnant and his parents didn't want the baby being born out of wedlock so since a pregnancy was involved he can legally get married. His parents pretty much signed him away because in a lot of places a minor can get married but cannot divorce. The reason being when they get married, their parents (or court) have to give consent because they're a minor. Since he's married his wife is basically his guardian, so she would have to consent and file the divorce. Otherwise he's stuck. The relationship was very abusive. She would abuse him and their child and specially abused him also. She was a vey muscular women and would hold him down to insert things in hi. He asked his family for help but they pretty !ugh told him to deal with it and he made these choices. See how I see things is if a minor can't get out of a marriage they have to business getting into one. When he was 17, the unthinkable happened. She "accidentally" killed their son. By "accidentally" she kicked their 2 year old in the head down the stares but she "didn't mean to kill him". He filed for divorce on his 18th birthday and they got divorced while she was in prison.

That whole experience completely ruined marriage for him. He swore he would never get married again. I was okay with that at first when we met...... Now ... I guess I feel like I kind of missed out. Being engaged. Planning our wedding. Exchanging vows. And before anyone says common law marriage our state doesn't recognize it so its not a thing in my state. End of the day I love him and will stay by his side married or not. Just kinda wanted to say how I feel.