Hello, since Kelly is essentially "your best friend" when you're home he certainly misses you but if you are doing the Sat-Sun.visits away on a regular basis he will get used to that schedule eventually. My male cockatiel is very attached to me and when my schedule changes as it often does he is VERY ready to be with me when I get back (and doesn't stop trying for attention till I let him out Images available only to Customers.
All things considered I am quite sure you are not hurting him.It's nice that you care so much though.Very nice!
Just a thought...
I leave the TV on a peaceful channel when I am gone perhaps you can do that for company so to speak or even a good station you listen to?
Hope this helps. It's always nice to talk with another Cockatiel lover who really understands how wonderful they are!
Thankyou & God Bless!