first of all, ur asking newgrounds, so
You are A RETARD.
well. since im not a 13 yr old faggot, no offense, i can help. I know a friend who was in the same deep shit as u were, and his girlfriend was also pro-life. He was 16, she was 15. Just say sincerely, "im thirteen, you are fourteen, we really cant have this baby. I have no job. You have no job. The pregnancy can kill you because you are too young. Im not up to it, and I cant say that if you have the baby, I will be there for you."
The earlier you get the abortion the less money, and the less pain. Right now its probably just a big lump, dont wait for it to become a fetus.