Well, I was 16 when I had my son. His father was 21. I'm not with the father (since I was 19) but my son is nearly 22.

You will give up a lot to be a mom and sometimes you might wish you'd made a different decision. It doesn't mean you love your child any less.
I wish I'd gone to highschool. And dances! And, even though they were dorky, football games and dates. I missed out on dates! Cruising in cars with boys. I missed a lot of things. But I gained a lot of things too.
Hang on to what you feel is important to you and let everything else go.
Good luck!!