You knowingly left your childhood home and possessions for this girl, I hope you thought about the consequences of doing so. So who says you can't go back home? Wouldn't you be happier with your friends and family?
The girl made a choice that she wanted and you should be disgusted with her for being pregnant, not trying to get her to abort the baby... OR HAVE SEX WITH HER. What is your problem? She slept with someone else and got pregnant, and you are still trying to find a way to make it work out. Talk about winning the Unintelligence Olympics.
Let the girl have her baby with the baby daddy and effing LEAVE. Just because you move away from your home town doesn't mean that your hometown is blown off the planet so that you can never return.
I hope you read what you wrote up there and it gave you some personal insight.
I'm not good at beating around the bush or sugar-coating things. My responses are never personal vendetta's on your emotional state. It is what it is, whether you choose to accept it or not. <3