He will still love you!! I work full time too and my babies know I am their mommy. When I get home its all about me!!! It breaks my heart that I have to leave them and they cry
They are home alone during the day...and the reason I got my girl was because I didn't want my boy to be alone.
Don't worry about it...just give him all the love for the little time your with him. Even if he's sleeping...just lay with him.