I'm desperate for an answer, what are these feelings?

Sounds to me like you feel very alienated from society and the people around you. It seems you feel like the rest of humanity is operating on a lower moral plain to you and thus you wish you could separate yourself from the entire world. I think this feeling is probably down to suppressed anger and a feeling of injustice about something, maybe going back to your childhood. When you say sometimes you feel like you hate everyone and everything, that is certainly an indication of suppressed rage and anger. I would've expected that your counselor would have had some insight into this problem but maybe if you suggest to him/her that your feelings may relate to suppressed anger he/she may be able to help you uncover and deal with the source of those feelings. Good luck.