I signed the birth certificate and now the baby is not mine in florida ...

by Disgusted

What do I do? I feel like such an idiot, I should have known, but I didn't. I've been taking care of this baby since he was born, my girlfriend finally confessed that he's not mine. I had heard it a few times, but she always denied it. Then one of her ex friends told me the whole story. That my ex knew the whole time the baby wasn't mine, but she just said it was mine because I have a steady job.