I don't feel invisible per say, but I do get the feeling whoever I converse with doesn't like me. Maybe I'm just hugely paranoid but I always get the impression I've rubbed someone up the wrong way or said something to offend them. I'm pretty jovial in real life, the old putting on a brave face syndrome, I'm always polite and I try to be nice to almost everyone without being overly nice as that's weird. I still nearly always get this inkling people hate me though.
When I've got to know people in real life they'll often say I'm nothing like "what they expected" when they first met me, and mention they assumed I was aloof, arrogant etc, even on dating sites I've been on, women will come out with things like they bet I'm a player, or I'm talking to dozens of women at the same time. In relationships I've nearly always been with women who've been jealous and accused me of cheating at some point despite never cheating on anyone my whole life, not even come close. In actuality it's the opposite of the image people have of me, I'm very self conscious, have very little self esteem, I have to will up the courage just to engage in day to day conversation with people at times and on these dating sites where I'm supposedly talking to dozens of women, I've been lucky to speak to one in a month. I was on POF during March for a good 3 weeks, I had one message in all that time and even she sarcastically said I'll leave you alone, I'm sure you're very busy.
I dress nicely (definite attempt to appear more confident) and I don't look half bad, and I think the exterior of me totally betrays what's inside. Instead of being invisible, I'm noticed and wrongly judged. I don't know which is worse to be honest. I suppose deep down we all like to be acknowledged, but if that means someone has the wrong impression, it can be a hindrance. I bet we're all guilty of judging books by covers though in some way.