I've been dating my one and only girlfriend for 2 years now. I'm 20 and she's 19. I love everything about her, except that I'm not sexually attracted to her anymore and I've found myself passing up the chance to have sex with her when before I wouldn't. We have the same taste in music, same sense of humor, same hobbies , etc, She is completely in love with me and I know it would destroy her if I broke up with her. I'm not attracted to her but I don't want to rip her heart out. I still love her, but I'm not attracted to her. What should I do??