Well, first, crate training is one of the best things you can do for your bully! It provides safety and security and peace of mind to you and your bulldog! Are you upset when you spend quiet time in your bedroom? Neither is your bully!
As for the chewing, you can try redirecting to his toys but he is very young and teething so until that stage is over, try to be consistent with crating him and providing lots of bones and toys!