Umm, let me try to summarise: 1. you like girl 2. girl is pregnant with someone else's baby 3. you still like girl 4. Don't know how to react to her pregnancy? Well, you did not specify whether she is still with her bf/husband/father of the baby or a soon-to-be single mum. Also, what is her age range? Honestly, if I am standing in your shoes, i would just say flock it. WHy should I bother with another guy's kid? Even if I love the girl, I would not want to dabble into parenthood if not ready and definetly not for someone's kid.