Guys, everyone who says he should run or get the girl an abortion is a piece of shit.
I was in simmilar situation with my girlfriend 2 years ago, the only difference was we used condom and still she got pregnant (remember 97%). I was 22 years old, totally broke student, with no attitude, job and motivation and after these 2 years I can say from my experience that getting a baby was the best thing that could happen to me. My life turned upside down. This situation made me to act and do what is important.
We are now married, living together in a flat. We both are finishing a bachelor degree. I am having a great part time job in local IT company and growing few businesses with huge potential. This could never happen if my wife didnt get pregnant. Take it as a opportunity to change your life. It isnt ruined, only if you run away...
By the way, I am 24 now and still full of energy and passion. Seeing how my daughter grows, how clever she is is amazing. It fills my body with joy and more motivation.