how do you know when you are being used?

if they never talk to you abt yourself and only talk abt themselves, always tries to vent to you but doesnt let you vent to them, constantly judges you for things you do/wear/act, starts acting "different" in front of other ppl like making fun of you or being rude, always asks you to do them a favor but they cant help you when you ask them a favor, also when they try to tell you to do stuff that they are into and try to force you to be a certain way...

another one i can think of that sum might disagree on is when you are their only friend so they act "nice" to you but they rlly jus using you so they dont gotta be alone...then when another person comes along they'll run to that person and not talk to you a lot anymore, thats another example of being used in my opinion

thats what i got so far lmao