3 years old spoiled stepson and a mommy to be! helppp!?

You should just tell him if he doesn't change you'll leave. Sounds to me like he doesn't really care for the child you are carrying, and no you're not too young to be pregnant. Seriously I don't know what's wrong with most people these days, being a parent is the greatest thing in the world, even if it happens at 18 years old or even younger age doesn't qualify for how good of a parent you are. You can have a teenager that's 16 and a better parent than an "adult" at age 35, age doesn't qualify for anything. So don't talk like that. You should talk to him and tell him how you feel, and if he doesn't respond to that explain to him you are getting fed up, and leave him for a little while. Take a break from each other and when you're both more grounded then attempt to work it out. If it doesn't work, then it wasn't meant to be and move on.