How to spend time with the dog and take care of the dog!

How to spend time with the dog and take care of the dog!
I'm looking for a pet house mate. I do everything in the name, not mine so what will he bring me? Will you try feeding him too when we are outside at night or on walks?? How can I please my friend if there is no one available?! It's important that i meet some good people because our lives would be very different without each other :). My heart hurts just thinking about it but don't worry.