(This may be the wrong subreddit for this so please let me know where this should go if this isn't the place for it)

I've had this friend with BPD for a few months (only know them online as of now) and their significant other recently broke up with them (not sure how long they were together since I only knew them after they started dating and I'm scared of hurting them if I ask about it). They've been really sad for the past couple days and I want to help them more. I tried asking them and they said all they could think of was just me being there for them, but I feel like there has to be some way I could help them other than just that. Don't know if this helps, but they've also referred to their partner as their favourite person, which I've been told is a BPD term though I'm not very familiar with it.