#leo has a family and is rarely ever truly alone so theres your happy ending

[sad-leon]

what if i gave rise leo BPD...

his anger manifests in the form of self-sabotage and self harm. he asks donnie to sound proof his room when they get to the new lair so he can wreck it without concerning everyone else. before that he'd sneak to the surface and wreck an already messy alleyway

his self harm is recklessness. he gets hurt in fights as much as he can and still get away with just a "please be more careful" lecture from raph

speaking of raph, his oldest brother is his favorite person. so when raph starts to brush him to the side and distrust him, he doesnt take it well. when he does something to impress raph and all he gets is "finally..." thats when he disappears for hours and comes back home with sore arms and usually some scrapes and many bruises

he becomes a medic because they can't ignore him if he helps them. plus he can get better at hiding his breakdowns if he can take care of his own injuries

he wants to be in the spotlight so bad until the spotlight shines on him and suddenly his skin fits wrong

splinter and raph brush it off as teenage hormones. donnie shuts it out. mikey is the first person to realize leo's moods aren't normal, but he doesnt want to confront the fact the bpd comes from trauma, so he tries to support leo as best he can

april doesnt realize how much leo's mood shifts until she spends a night in the lair and realizes that leo isn't as hyper as he presents himself. he tries to mask, but he's too tired and the sudden silence from leo throws april off. it creates a rift between them. even when leo is happier around april, she knows somethings wrong- knows its not quite as genuine as she thought.

she spends more time around donnie than leo and leo thinks its for the best. eventually all his brothers- all his family prefer spending time with someone thats not him. he tells himself its for the better- the less time they spend around him, the less likely he'll be upset around them and end up making them upset

leo convinces himself he's meant to be alone and puts his all into being the team medic and spends the rest of his time alone and dissociating. he hates being the leader- having everyones eyes on him all the time. watching him. waiting for him to mess up- to act out- to prove they were right not to trust him

.... idk.. just a thought