Pro tip when writing, The Audience loves unnecessary relationship melodrama and you can always squeeze a bit more of it out of the characters when you are running low on ideas
"It doesn't make sense for this argument to happen and ruins their character development"
Sounds like the words of a coward
If you aren't actively questioning if these characters would even be friends or lovers in real life, you haven't out enough drama in
Character traits and motivations are great, but consider, they could be petty bitches with no redeeming qualities that constantly fight
Make a character prove his love for another by eating a small creature live
