This will be difficult and probably affect you emotionally and mentally for your life, but it is nevertheless a brave and probably very good choice.
I bet if my mother hadn't got an abortion at around your age, she would have been miserable-
my sister and I never would have been born and she wouldn't be the self-reliant, content and loving mother she is to both of us today :)

(eh, sorry for my english, these past tenses are difficult)