High school boyfriend... I need advice

Hello everyone, I need your help. 
My boyfriend and I have been together 1.5 years, I am a senior in HS and he is a junior. He's my best friend and I love him Lately I've had the urge to talk to other guys and question if I still want to be with him. 
Our relationship is kind of odd, he doesn't like to include himself or ask friends to hangout, and doesn't enjoy when people drink, but I am the other way. I don't drink often, but I am constantly looking to include myself and enjoy being with friends, but am constantly worrying that I should be with him so that he is not alone. 
The hard part is, is that he is the NICEST and the BEST and most caring person I have ever met. My family loves him and my friends tell me I am so lucky, which doesn't help. 
I'm afraid to hurt him, because I feel like if I do, and realize I am wrong, there is no going back. 
Will someone please give me advice?
Thank you in advance.