> I was thinking I was nagging her by calling every day so I figured I’d give her a break and wait a few days.

That is a nice thought.

> Till I wrote a pen pal and found out this isn’t a wise thing with borderlines.

Well... Every person with Borderline Personality is different. I'm not sure how much you can generalise from how 'typical people with BPD are likely to react' to how the woman you are seeing is likely to react.

I'd... Talk to her about it. Call her if you want to call her and say 'I'm not sure if I'm calling you too much, but I like talking to you. When would you like me to call again' or something like that maybe.

I think... It will take some time to figure out. Relationships are like that though...