Becoming unstuck in time..

To start off i dont think mr ford should take the fish down.
But onto slaughter house five..
The only problem im having is the fact i still havent finished it and am finding it a really slow read.
Everything in the book apart from the main war story and the tralfamador stuff seems really pointless, like all the things he has in his life and then its kind of like, well, is that actually happening or is he actually going crazy?
Because in the book everyone calls him crazy and he acts a bit crazy, and Vonnegut doesn't make it particularly clear whether he does have mental issues or if that is what actually happening to him. Cos when he becomes unstuck in time he doesn't seem to leave his body but his body would still be at the present time he is in..if that makes sense at all so i dunno.