I think we live in the time period that for a lot of girls who come across this situation, they ultimately make the choice for abortion. I, for one, know that if this happened to me I'm in no financial situation to handle a child, nor do I want the responsibility.
People say "ohh you're having sex then be prepared for the consequences". This is true. For people who aren't careful. People everyday have sex with no intention of conceiving. The blame falls on both of you for messing up this big, and even though it's your kid, it is HER life and HER choice and HER body. As a girl with plans for a good future, an abortion would be the choice I'd make.