Am I depressed, emotionally lost, an outcast, mental or simply... "being a teenager?"?

you have not integrated yourself. you are making yourself miserable by these machinations and living a lie, lying to others. it is not honorable or ethical to hate your friends. you should not pretend to like people that you hate. in truth you both love and hate your friends and have not integrated this. i recommend either yoga or buddhist study for you to integrate yourself and be happier.