What is normal depends on the environment you live in. If you are born into a tribe that engages in canibalism, then eating human flesh might not be a sign of madness for you.

Basically, being sane means being able to competently cope with the challenges that you encounter in the world in which you live. You don't have to cope superbly with every single challenge. You have to cope well enough to get your basic needs met, so that you are not almost always in severe distress. Being weird or immature or cruel doesn't make a person insane.

No one can possibly figure out what might be wrong with you on the basis of the info you provide. If you are very unhappy most of the time, then something is wrong. First talk to your doctor. It probably would be a good idea to see a therapist. Your doctor should be able to refer you to one.

Instead of trying to figure out what you are, ask yourself what it is that you want that you have been unable to get. You sound young. You sound unhappy. That's a problem. It does sound like you need help.