My sister has had unprotected love multiple times and got pregnant each time. She never learns, and never will learn.
You can do multiple options here;
Abort it - Most girls don't go with this though because it's a life. Personally I find it a great option if you are not ready for a baby.
Give it away - Your letting it live, so that would be a plus if she's not for aborting.
Live with it - You may end up paying child support later on, but next time you won't be dumb. Think with your head, not your richard. I've turned down love uncountable times, you can too.
Plan B - Free, and convenient. May work up to 72 hours later. Go to a health clinic and request plan b and tell them it CANNOT wait. Most of the time you will be given it on the spot.
And remember, learn to wrap it. You can get condoms for free at some places.