I need Christian advice.?

my bf & I have been 2gether 4 a while & we r both Christians. but recently i've let him "touch me", u know w/ his hands in my pants. anyway, we've never had & don't plan 2 until we're married. we've never even seen each other naked or even in underwear or underwear & bra 4 me or anything like that. we didn't even plan 2 go this far but i guess it was out of curiousity and human desire that this happened. i was wondering if it's wrong 2 do what we're doing? if so, is there any turning back now? is it possible 2 stop all 2gether? it's not that it doesn't feel good, that's a natural human thing, but i'm starting 2 feel a little worried. i didn't think anything of it until just the other day. please help. i don't want my relationship w/ God 2 suffer.