New Step mom starting out...

Have you truly asked yourself if you want to remain in this relationship? I'm sorry but at your age, I was working on a masters degree and dating, not taking care of two young children and dealing with an aggravating bm. Your too young to be dealing with these type of problems, imo. Now, if he stood up for you or himself, that'd be a different thing. He's so young too though to be dealing with all of this. I just wonder if you're taking on too much of someone else's responsibilities. Good luck.