It could be real. It might be not real, or maybe it's exagerrated in your mind?
I would say that when I've had similar issues the results have been:
25% of the time - My suspicions were correct, they do all hate me.
25% of the time - I'm just paranoid, no one cares about me either way
50% of the time - There's no way to find out, I'll never know
If you like the job then you might not want to let them run you out. I don't know what you do, but if you work there long enough you will start to be one of the longer-serving employees, and people will probably start to just get used to you and your ways.
Or maybe not? Maybe the problem could go on for ever?
It might be real, since some people have no way of feeling good about themselves except by making other people feel like crap. That type of person is hard to deal with period, and very hard to have as a boss. So I hope he's not one of those.
What are some of things he has done that seem like he is trying to get people to hate you? What stuff is he saying?