I'm 21 and I can't stop thinking philosophically, I feel unique, I think too much, is this normal?

I'm always contemplating in my head. I'm always thinking about theories and paradoxes. I don't get out much but I feel tired. I'm bored with myself and my brain. Not that it talks to me or I'm going crazy but I'm always thinking. Colors, numbers, theories, history, I'm bored with myself. I get confused a lot. I'm never mad, never upset, never laughing on the floor crying, but I'm not upset that I don't do that often. I don't care if I do that. In fact I don't care about anything but the only thing that keeps me going forward and doing the right things is anxiety pusing me to do things. I don't know. I just feel like I need a 2-3 year long vacation away from myself.