LGBT: Does this mean our relationship is doomed?

I'm 15 (almost 16) and my boyfriend 17, we've been dating for 7 months. OK anyway, yesterday I thought it would be fun (and hot) if we took a bubble bath together and so we snuggled and kissed and messed around a little but I wasn't turned on by it. I do love him with all my heart and I do find him attractive. Is it a problem that I wasn't turned on by it?