Need support leaving son’s dad

Hey! I don’t want to be a trauma dumper, but my bf is an addict who is currently in rehab. He’s doing amazing, but he has put myself and my 6-month-old through so much that I don’t know if I can move past it. I know it’s not fair to him if I stay and am constantly resentful and bitter. And it’s not fair to me and my baby that I accept subpar treatment from him. I guess I’m guilty because he’s finally getting better but it’s a day late and a dollar short. Does anyone have advice on how to move through this or make it easier? I don’t even know if I’m strong enough TO break things off. But my baby needs a great life, and it’s my job to protect him, even if it’s from his own dad. I could really use friends and just support because I’m pregnant with our second baby right now, and even though I want the baby so bad, I don’t even know if I should have them knowing who their dad is. Peace and blessings to everyone who reads this 🤍