Am i overeacting? please help 10 points?

sorry if this is a bit long but i need advice. this guy lets call him billy is 19. im 14 about to turn 15. he recently got out of jail about a month ago and he came to my church. he was sooo gorgeous!! so i got his number and we were textin and that next sunday i snuck out to go see him. we ended up having .after a couple more visits and texting him i went ova there and he told me he loved me. i was falling in love with him to. now my mom is a jehovah's witness. everyone on my mom side is and i love with her and they dont celebrate holidays, birthdays, no dating unless your looking for marriage.and so i have absolutely no freedom. and i dont even like that religon realy. so i really hav no choice but to sneak around them. i dont want to but its leading me to whr im having to do things behind their backs for me to actually have a life. but anyways so i see him pretty much every weekend and everytime i see him he tells me he loves me. my cousin has even talk to him and he says he's got me for life and he'll neva leave me. im the only girl he's "been with" since he's gotten out. he's said love things like he loves me more than all the leaves n the world and when i looked around the next day i was like daaaang that's alot of leaves. and he's also said he loves me more than all the stars n the sky and the moon above. he's expressed his love so much even sayin how he wished i was older so we could move in together. he's the perfect boyfriend but it's like i have this wall buiilt up in front of me. i want to giv myself to him 100% but somethings holding me back and i dont know y. he hasnt done anything wrong so y am i holding back? i love him more than anything and yet i just cant let go of that wall standing in front of me? y am i doubtful? what's stopping me? 10 points please help thank u...and yes i know he could go to jail and im to young bla bla but that's y were not blirting out our relationship so he wont go back to jail