Insecurities

I've been feeling insecure for a while. I've been feeling down and not worth much. I felt like I haven't accomplished much and I have not had the energy to so anything. My boyfriend's father didn't make it any better when he apparently suggested to my boyfriend that he finds a better girlfriend once he moves to Virginia. Honestly, that made me feel even worse about myself. He's going off to college and I'll be here stuck in this small town trying to find a job. I'm a highschool student. I haven't took any honor classes since sohpmore year. I've never been in any sports. I'm not that feminine. I want to get more feminine energy. I want to feel beautiful. Not because my boyfriend compliments me, but because I look at myself in the mirror and think "Damn, I am worth more than anyone else says." Every since we started dating I gained quite a few pounds. I went from 119 to 140lbs. I want to lose weight to feel better about myself. Does anyone have advice on how to open myself up to more feminine energy and to lose weight? I'm 17 years old btw.