Things are getting rough for me lately, and I opened up to some friends about it (I never open up to anyone, ever) and was met with:

"Just exercise and improve your diet and hygiene." 
"Oh yeah, I ran 5x a week and didn't even need medication anymore!"
They even suggested it would be more effective than therapy.

I didn't deny that those would help me, but people don't seem to understand that this goes beyond a mood disorder. How is exercise going to teach me to stop splitting? How is anything other than working with a trained professional going to help me unlearn toxic patterns and cycles that I've internalized from childhood?

I also get trying to help and someone not having any experience with BPD, but it just comes off as extremely dismissive and I really didn't need that right now. I guess this is why I don't open up.