I dont know whats wrong with my boyfriend?

Honestly, I think you both need to take the pressure down a notch. I can understand that = intimacy and lack thereof can make you feel unwanted; however, it shouldn't. You're putting pressure on him, he's probably putting pressure on himself, you're obviously stressing yourself out. Wow. Don't jump to conclusions about whether he's cheating, whether wants to break up or whether he isn't interested anymore because men sometimes just go through phases where they simply aren't in the mood (yes, even young men). You need to tell him straight up how you feel but be prepared to listen as well. If he has little or nothing to say in return then don't worry and most importantly do not judge...just let him speak up if/when he wants to do so. And as I said, take some deep breaths and relax. Not having isn't the end of the world. If you relax and dial back the pressure things are more likely to work themselves out sooner rather than later. Keep worrying and driving yourself nuts and things will continue on their current track or perhaps even get worse.