Copying one of my favourite (and last saved) comments from Reddit:

The most precious commodity we have is our time on this planet, and we have far less of it than we realise. The time we choose to spend together is a gift we give to each other.

Appreciate the gift of their precious commodity that they give you, don’t expect more than they are willing to give, but don’t squander your precious resource with someone who doesn’t appreciate your gift.