I think you are very brave. If you don't want to give up your baby, there shouldn't be any reason why you would.
If the father of the baby can't have you living with him/renting out a place together, then there are always options you can take.
How long is it until you reach 16? I think that there are woman and child shelters that accomodate you if you are 16 and over, and sometimes even when your less (I'm not sure if this is the case where you live though, it'll be up to you to have a look).
I went there when my son was three months old, because it was absolutely impossible to live with my parents, I was never forced to give my son up, but I don't think I could even if someone tried to force me. Shelters aren't a pretty place, but they're something, and they're seriously not that bad -- you know in your mind and heart you won't be there forever.
There's also the option of trying to live with your friends, although that is VERY problematic. I've also heard of families who 'adopt' women with babies and let them board at their house, I think that's a form of foster care.
God bless and good luck.