Ok sooo I've been having doubts here lately.... My bf is great dont get me wrong but I just keep…

Ok sooo I've been having doubts here lately.... My bf is great dont get me wrong but I just keep having doubts that he's gonna stick around once I have the baby... It keeps breaking me down... I guess it's bc my daughters dad and I split after my daughter was 3 bc he was abusive and my sons dad left as soon as I told him I was pregnant and I never heard from him again until my son was almost 2. I guess I'm just judging off of those two dummies. We have been together for almost 2 years now and yes at first we were both scared that I became pregnant because we both have kids from past relationships but now we have adjusted and he's been great, if I say I want something and we don't have it, it doesn't matter if it's 10 pm he will go get it, he's protective over this baby already and I love seeing that. I think I'm just a little paranoid? What do you ladies think? Am I just being weird or just plain out crazy?