I've been dating my boyfriend for 11 months already, and he is the first person I've had sex with. I really feel like he is the one. I love him so much and all, but it bums me out that I won't have the chance to "experience" what it's like to be other guys. Also, lately I've been really having the urge to experience with another girl. I know.."I never know what could happen in the future between us" but the thought of being with only one person while he has been with 4 other girls sucks. Is it bad for me to think this way, or is it understandable?