Sorry to drag up an old thread, but reading this thread has been really interesting for me because I have this exact problem! For me it seems to be cropping up with lecturers at uni. I don't have many friends and none of them know about my SA and panic disorder, whereas my lecturers do and are highly supportive of me (even more than my parents at times), and I feel like I have this real closeness with 2 of them in particular because of it. I am very conscious that the reason I feel so strongly attached to them because of all the personal info I have shared with them so that they can help me at uni, and therefore I make an effort not to be over-friendly with them. I have been feeling like a bit of a freak because of these feelings, so it is really comforting to read that other people experience similar problems.