If I remeber what you said in your other post u said your moms let your uncle abuse you, anyways in that case I would atke off and go anyways if your mother contraidcts you give her an ultimatum either you uncle goes or you do!! I dont usually give advice on !**@! with your parents but your sitiuation is different, so anyways sit her down and tell her how you feel, tell her your sick of her !**@! she only cares about you when you travel but doesnt care when you are home(with an abusive family member) what
you need to put your foot down, stand up and go you love him right and he shares the same feeling?? If he does then he may be able to get you away from the craziness you are living right now for your sanity I say go!!
One question though, have you met him before??(dont take this the wrong way but iternet dating is huge) if you havent then it may be better you dont cause people lie and I met a pedophile!