borderline vs avoidant

How many borderlines feel like they can relate with some avoidant traits as well? I know sometimes I feel like I have some of those traits like strong desire for social interaction but avoiding it for fear of rejection. I always just felt I was a little shy though. Always have been since I was little but now it's gotten to the point of sometimes being terrifying. Not usually, just sometimes, so I feel I can relate to people with this problem in some way. Hell, I nearly didn't graduate high school because a public speaking course was required and I was perfectly content to drop out rather than do a speech. Public speaking sends me into what a panic attack must feel like. In fact, I only graduated because my speech teacher finally recognized how serious my problem was and told me I didn't have to give any public speeches in front of the class. Instead she asked that I only give one really good speech about something I love to just her and her teacher's aid. It was hard to do but I did it and because of her I graduated. I've heard that one cannot be borderline AND avoidant. It's either one or the other but I swear, sometimes my fear of rejection is so ridiculous it makes me wonder. I'm just not a very extroverted person although I've always dreamed about being so. I mean I know how easy it would be to change into that way of living. It's really simple. Just do it. But the idea that people will look at you like you're some kind of idiot is just too much to tolerate some times. I mean I already know I'm a quirky weirdo. Everyone I know knows that. It's part of my charm . But I still fear rejection too often and it's just stupid. Do I fear it because it's essentially the same as "abandonment"? I don't get it. It's ridiculous. I wish I could be someone that just didn't care at all what anyone else thought. To an extent I don't, but I have a limit. I don't want to be rejected.

Yeah i think there can be some connection between the two. AFAIK they both have there roots in similar experiences during infantcy.

In the AvPd Wikipedia article it says 'Although it is not mentioned in the DSM-IV, earlier theorists have proposed a personality disorder which has a combination of features from borderline personality disorder and AvPD, called "avoidant-borderline mixed personality" (AvPD/BPD)'

I am not sure if I have BPD, but I believe I do. I feel the same way about that avoidant relation. I'm overly shy about stupid stuff.