his mood is super hard to fathom. he can be ok this moment and next he will be another face. so what can I do? 

I'm trying my best to close up the gap, to break the wall, but I guess he can't be bothered. 

responsible as he may be. stable feel that he gives others, matured thinking? Only in work, not personally. 

His mentality still need to change. his attitude needs to change too. not only others have fault, he himself should reflect too isn't it? 

I'm tired of trying to close up the gap or to treat him better already. this is all I can do and I will do.