James: His ability to always seem to land in trouble and your closeness to Regulus

Sirius: The way he acts around your friends and how you are friendly towards some dodgy Slytherins.

Remus: His werewolf problem (he always argues that you shouldn't be with him because of it) and how he puts himself down because of it.

Peter: The amount of detentions he ends up going to because it usually messes with your hang out times.

Regulus: His pureblood views and how close you are to Sirius.

Lily: Her being friends with Snape and your prejudice against most Slytherins

Marlene: How she seemed to flirt with other girls and the way you tried to make her jealous by flirting with James or Sirius.