Then one time they ask you for a favor and you cannot follow through because you don’t have the time or resources and they belittle you, or get angry at you.
Other kinds of user-abusers will stretch their “Friendship” with you by asking more and more of you until you realize that they are truly abusing the relationship
“Hey Fred how about a smoke for me and my pal”?
FRED; “Sorry Pete, I only have a few left”
PETE: “Ohhh, mann, come-on, what about your buds man, we need a smoke man”?
FRED: “Nope, sorry man, that’s the way it is now don’t be a “user and abuser”
PETE: “Oh, see how you are man, I’m not a “User/abuser”, and I told my pal here that you were my friend. We’re outa here man”!