then it's obvious that either you are desperate about something and have no means of getting it, thus your feeling of everybody else being fake. Have a thorough check and you will realize all those that you feel are fake are people that seem to have what you desperately need like a man, job, money, etc.
There is also a point in life where by a person just needs to be alone to be able to reflect on the priorities of life. Your feeling of hatred towards everybody could be a way of readjustment in your life by shedding off all the wrong people.
Respect the feeling and avoid people for a while in the process you will get to know what is really wrong and probably might start missing people around you thus being normal again.
All the above are based on my personal point of view and not a professional's advice, bottom line you know best how you feel and probably how to deal with it.