dirty mind?

Okay honestly what is wrong with me. I'm 16 and have been thinking about sex with my boyfriend (of a year and a half). I've never had sex with him but I can't stop thinking about it. I've always had a high sex drive since I was like in 5th grade. Like that's when I've started masterbating. I've been having trouble focusing because I cannot stop thinking about it. I've masterbated more than 10 times in the past two days. Is something wrong with me? Should I be worried?