What do you think's wrong?

I see things and hear things that aren't there and I get off into my own little world and I look emotionless but I could be really happy but people say I look depressed. I love being alone. I am extremely paranoid. I carry weapons on me at most times. I get really happy and like yell at the top of my lungs and don't even notice and I will get really depressed and just slap the **** out of myself and laugh as I do it. TRUST ME I KNOW THAT SOUNDS REALLY ******* WEIRD. I laugh because I feel no pain and I just don't care and I will make my nose bleed sometimes. So what'd you think's wring or am I just quirky?