I've known one of my best friends since high school, and from the very beginning since I've met her fiance I've had a crush on him. Lately I've been really jealous of her because I think he deserves better. Lately (actually, most of the time), she's just been a complete pain in the *** with everything and they argue and bicker a lot even when I'm there. I guess I just need to vent because I know he loves her and that they'll be together, but my feelings for him won't go away. I flirt with him playfully and he flirts back, but he knows I'd never try and steal him away from his fiance, and I won't, but I feel lost. Maybe it's just because I've never had a boyfriend or had sex, but I'm concerned about my feelings for him because I'd feel bad if I got in between them and wish I didn't feel this way.