This sounds a bit like me - I've been with my girlfriend over 3 years, but we've recently hit a very rough patch. I think that I might have BPD because the symptoms match very closely with my recent behavior.

I don't know quite how to explain it but it seems like she's making lots of excuses as to why we can't spend time together and when we do see each other, its usually only once or twice per week, for just a few hours. I find myself going from really intensely loving this girl, to being very anxious and paranoid that she's doing something behind my back and I find it hard to cope. I try to end our relationship and move on but after a couple of days of reminiscissing, I find the void in my life so overwhelming that I can't help but try again with things...