I think I'm fat because boys say I am and i have luv handles?

I'm scared to show off my body in a bikini because I am ashamed of it. I'm going in to middle school and now I'm even more scared. Half of my shirts are tight i used to like me love handles because i thought they were curves and i looked them up and learned if you have them you are overweight and im not! I hate my body and boys are rude to me is this why? im just so ashamed.