Best Friend Forever? ?

Best friend forever or best foe forever?
Used to have a close friend, He is my roommate too.
Remember those were the days that we could joke and laugh together. We were that innocent and playful.
We could share things transparently and crack into joke easily.
Moments we have is priceliess, really cherish the frienship I had.
I always be happy that I could be  blessing to him. All the room house chores are done by me from washing the toilet to cleaning his bedsheets, clothes, ....etc.
Things starting to change after his industrial training he tend to be more passive than last time.
Changes even become more drastic in 2013, he started to display more changes in attitudes and behavior.

I hope that I can save this friendship, he seems to be amiable, Not really care...
Even his greeting become "robotic". Words of "thank you" become rigid and structural. It really hv become a duty to him to respond towards me. I don't really feel his sincerity.
I did not expect him to repay me.
All I require is he spend some time with me and have an honest conversation.

Did I did something wrong?
Am I treating Him too good?
Izzit worth to continue to keep this friendship or I just forget him and move on?

It is a Blessing that he come to my life or a Lesson? I hope that we will continue to become good  friend,  maybe a better friend in time to come