Well that means you are retarded, discrediting "normal" teenage life without ever experiencing it yourself. I speak from experience when I say that it's not for me. I don't personally don't like crowded spaces and loudness. When I hang out I am more of a lounging guy, and I don't drink, so parties are just not my thing and I feel uncomfortable there. Instead when hanging out with friends I go to a café and just talk rather than getting drunk.

Good for you that you are a social person without realising it yourself, but spending time alone is not wasted time if you spend it right.