(not saying I don't do some of these myself)

• Make me feel like my feelings/worries/concerns are stupid or irrational, even if they are.
• Complain a lot.
• Talk about their significant others all the time.
• Feel sorry for themselves.
• Don't do the things they say they will.
• Flake out on plans/aren't dependable.
• Be overly dramatic and make a big deal out of nothing.
• Ask me for relationship advice, as if I'm experienced or something.
• Tell me not to cry.
• Get offended easily.
• Relate my problems to their own, instead of just listening.
• Beat around the bush.
• Lecture me. I have parents k thanks.
• Assume they know me a lot better than they do.
• Judge me.
• Attempt to apply stereotypes to me.
• Insist on putting labels on things.
• Make me feel stupid or call me stupid.
• Can't agree to disagree, and insist on arguing.
• Are close minded in general.
• Are close minded when it comes to sexuality.
• Repeat themselves a lot.
• Drop everything for a significant other.
• Assume that being in a relationship means losing all your freedom.
• Treat me like I'm naive.