Crabbe feels alone due to the fact of being admitted into the hospital. There are not many kids on the same floor as him.
Crabbe was not one to go and work out, everything was usually done for him by other people.
Crabbe thinks that people only have a problem if they aren't able to get the things that they want. He believes that he is an average drinker when he really is an alcoholic.
Crabbe had gone into the wilderness without a map or even a compass due to the fact that he is inexperienced and has never learned how to use either.
Crabbe is smart but didn't put too much thought into school because he said that teachers who know all, ask those who don't know and don't care about the students opinion. So a new teacher told him to THINK and work hard because he is smart enough to do so.