Yeah I dunno, no offense dude, well actually take as much offense from this as you choose to, but you're being a real dick
It also seems that you have been for quite some time
You slept with this woman, and although you have no intentions of marrying her you have wound up in this position.
I think we all understand that part, this includes you.
Now I'm not "pro" anything, everyone has their own feelings on matters that relate to new life and bringing it into this world but the fact that she has chosen or would like to keep the child does not automatically preclude you from any responsibility.
You were adult enough to sleep with her, therefore you have to be adult enough to live up to the responsibility that you are now confronted with.
Even the fact that you jokingly said "entrapment" not only demonstrates that you are incredibly immature, but also demonstrates the kind of reasoning logic that got you into this in the first place.
If you have one, go explain the situation to your father, he would probably be able to give you some guidelines on becoming/acting like a man. If not, then I feel sorry, not for you but for the child and mother