Poor thing
u know ur life is never gonna be the same as before now. U have a new life, a little life is inside of you and growing everyday. It is a beautiful thing!
So now, be possitive! U know that everything will be all right!
It's perfectly fine to be a single mom nowadays, talk to your boyfriend to compromise. Tell him that pregnancy makes a woman emotional, tell him to just be patient and listen to you more, talk more, because if he loves you, he will try to make things better and at least easier.
True that u two are so young, most likely he does not know a thing about being a dad or even a boyfriend, but he will learn if he wants to.
If he does not want to work with u to make things better, honey, dump him! Seriously it is ok to be a single mom, and u said it urself, u have ur friends and family, ur mom is being so supportive which is a great thing, be grateful, tell her how much u love her.
Good luck to you, and just relax, worry too much is not good for you and the baby.