My boyfriends doesnt like to go out?

basically..have beenwithboyfriend for a year and a half,we get on amazingly,have few arguments but feel as though we are really close. ive always liked going out to clubs and at the start,even though he didnt really like going out,we went out about 3 times a week.he said he did this becausehe wanted to make mehappy. now hes said he doesnt want to go out anymore..onlywhen theres agood night on.i askedhim why hes suddenly said this and he says that it because hes done it for too long and just cantdo itanymore.i thought it might be because he doesnt have the samefeelings for meashe used to.hesays that thisisnot the case.he still cares about me as much as he always hasdone but just doesnt like going out and feelslike hesdone it too much. imnot sure how to feel about this!ireally care about himbut dont really understand why he did it before but wont anymore.