People should invest effort into maintaining relationships.
Heidi and Hayley are good friends living in different states, so Hayley often makes the trek to visit Heidi.
Heidi wants to hold on to her friendship with Hayley.
Heidi decides it would be nice to make the trip over to see Hayley for a change.
Hayley asks Heidi to come visit for a weekend sleepover, but Heidi tells her that she'd rather have the sleepover at her place.
Hayley appreciates Heidi's effort and their relationship remains strong.
Hayley gets sick of being the one who has to travel every time and eventually loses contact with Heidi.