Hi Fig tree,

I'd like to welcome you to bpdfamily. I'm sorry to hear that. I can see how emotionally distressing that would feel when we have a loved one that suffers from mental illness with the highs and lows.
They evaluated him and said he was fine.
Mood instability or emotional dysregulation is when someone cannot regulate their emotions or self sooth and may subconsciously turn to substance or others to self sooth when we really should manage our own emotions, skills like DBT / CBT is like a recipe book for emotions. Often the behaviors are directed at the people that are closest to them because loved ones are tempered to the behaviors.
Does he live with his girlfriend? What do you do for yourself for self care? What is your support network like in real life with family and friends? Are you seeing a T?
What does it mean to take care of yourself?