(((( Unbeliever ))))
It sounds like you have already decided what to do: Keep the baby and raise it yourself in the US.
The only thing holding you back is the fear of the unknown... all of the changes in your life, problems, difficulties and responsibilities associated with raising a child, not to mention a fear that you will make the same mistakes that your parents made.
I'm certain children have their redeeming characteristics, otherwise people wouldn't be making so many of them!