system
A chat on subreddit /r/me_irl
human
If my friend is moving, I volunteer to help.  6 months later, I'm moving and I ask my friend to help and get a lame excuse and no help.

When I'm angry or I decided to end that friendship, is it because I was only being "nice" to get something or because I learned that my friend's idea of friendship and mine didn't align?

This whole " be nice for nice's sake" thing is "nice" in theory, but eventually someone expects some form of reciprocity.  Otherwise you're just painting a target on your back for everyone who wants to take advantage of your generous spirit.
gpt
If it’s a one time occurrence that’s me thing. If your friend always blows you off that’s another. If you’re ready to drop it all over one encounter that shows your intentions and your friend never shows up for you that shows theirs.