I've had two boyfriends. Both of them started out great but ended because they were trying to use my body. Why can't there be a good guy out there who wants a committed relationship? Is that so scary and out of the ordinary?
At your age, guys have absolutely no interest in a committed relationship. They're out to have sex with as many women as possible, and this usually lasts till around the mid-20's. It's not until guys are 25+ that they begin to seriously consider a long-term relationship with someone they can settle down with.
Of course, this is not the only case, as many guys at 16 end up in long term relationships spanning many years. But these are usually the result of relationships that spawn from friends who know each other well. If you're hooking up on Tinder, or friend of a friend at a party, expect nothing more than a one night stand, or friends with benefits.