While I completely agree with you Synnen, 100%, I do have to be the devil's advocate.
If the OP doesn't choose adoption, and chooses to keep this baby, let's give her some tips on how to achieve being a mother at 13, kicked out of her house (according to her and her relationship with her mother), when there's really no way at all for her to do this.
I agree that we're here to talk, we're here to help. I do care about this child, and her unborn baby. But I'm being realistic.
My son is 16, he is now old enough to get a crap job for minimum wage at starter businesses (we're talking retail, fast food etc.) in our area. Even if he worked full time 40 hours a week, he wouldn't have enough to pay rent on a crappy apartment. Food, a car, insurance, clothing, etc. etc, not an option with that pay. That's without a baby!
So let's be real here. The OP is 13. McDonald's in my town hires at 13. They're the only ones. They don't hire full time for that age, because 13 year olds are still in school, and have to be in school until they're 17 (that's when they're legally old enough to drop out where I live). At 17, they're eligible for the same crap minimum wage jobs my son can get. Not enough to live on. Not even close!
Now, I realize that the OP likely doesn't live in Canada. So let's assume that she's in the US (the minimum wage in Canada is over $10/hr, it's much much less in the US). Where can she find work that will pay enough so she can not only get an apartment (she's 13, and legally can't sign a lease, unless that law doesn't matter where she lives ) but afford that apartment, medical costs, baby formula, a crib, diapers, clothing, the hospital costs (if she's in the US can be $12,000 plus), stroller, food, insurance, etc. etc. etc. and everything else when it comes to the cost of having a baby.
So ya, I'm willing to talk about this, I'm more than willing. But I have to say, I have yet to see an 18 year old (a legal adult) that didn't struggle with being a single parent. How is a 13 year old, someone that can't even get a job, can't sign a lease for an apartment, whose mother is kicking her out, going to raise a child?
I'm all for it being the OP's choice. All for it. But I'd like to hear how the OP plans on making her choice a reality. Because it doesn't add up. No way a 13 year old can raise this child unless mommy or daddy do it for her!