They will accidentally hurt your feelings by playfully insulting you and taking it too far.
They will stop paying attention to you the second they start dating someone.
They will cancel plans with you at the last second — or completely forget they made plans with you in the first place and ghost.
They will ask for your advice — and then completely ignore it and come back crying to you again soon.
They will one-up you every single time you have a success story they should be congratulating you on.
They will get into an argument with you about politics or religion that ends the friendship.
They will ignore your texts and stop talking to you out of nowhere because they get distracted easily.
They will get into a screaming match with you over something stupid and then take their nastiness a little too far.
They will sleep with one of your exes or siblings, and then things will get awkward.
They will distance themselves in order to focus on their career, then act like you don’t exist.
They will turn down plans because they’re too lazy to hang out, and you’ll slowly grow apart.
They will gossip about you to their other friends and the news will get back to you eventually.