how does crooks react to Lennie when he comes to visit?why does he react this way?

Initially Crooks does not want Lennie in his little room. He tells Lennie to get out. Crooks is not allowed to visit anyone else on account of his colour. His little hovel by the horse stable is the only space he can call his own. Eventually Crooks lets Lenny in though. Crooks is lonely and he realizes Lennie has mental problems.