First of all sorry if I break any rules, I'm new to this subreddit and I'm not sure if I'm doing everything right. Story time:

I've known this girl for a long time, and in the last two years we've become really good friends. We've had our ups and downs obviously, and sometimes it's been hard to understand her behavior, but I love her so much (it's not a romantic thing by the way) and don't mind about those little misunderstandings. I've always tried to talk and fix our things, and I think we've done a great job on that.

Since COVID appeared she's been having a really rough time, and she has recently been diagnosed with BPD. I just want her to be happy and don't mind if she hurts me sometimes, what I don't want is to hurt her myself. So here I am, looking for advice on how to act around her, what things I should and shouldn't do in order to help her as much as possible.

Thanks in advance!