Ooooh, tough situation! That's pretty bad of him to first want to get you pregnant and then tell you to get an abortion!
Here's the thing... if he's immature enough to resent you for having his child instead of "giving him the time he needs", getting rid of the baby won't make him stay with you or not resent you.
If you really aren't ready to raise a child, you could always look into adoption. That way you could still not have to deal with a baby for two years, but you wouldn't have to loathe yourself for killing your baby.
Getting an abortion is NOT a good option. ESPECIALLY if he's the one that's pushing you to get one when you don't want to.
I know that you love your bf, but you need to do what is best for your baby and for you. If you kill your baby you will regret it for the REST OF YOUR LIFE.
I know that it's a really hard decision to make, but if you read around on this site a little more you will find that abortion really only destroys... it destroys the baby, it destroys you, it destroys your relationships etc.
Giving life to your baby will cause a strain on your relationship, but if it is meant to last it will, and you will be able to live your life knowing that you were strong enough to keep your baby in spite of the odds.
I know that you have a lot going on, but I hope that your boyfriend comes around.
Let us know what you decide!
Hugs!