Rule 237: Beware the
Catfish.
I tried the OK cupid thing for a short time, and there were a lot of guys who claimed to be interested in relationships and stuff like that, but ultimately they were looking for5 masturbation material (seriously guys asked me to send nudes of myself to them) or they were looking to play some sort of game where they could feed their ego for a while and them go along their happy way leaving a wake of destruction.
Then there are the sex-starved ones who lie through their teeth saying they want a relationship, but in reality all they want is to bugger you, or get buggered.
In your case it seems like you have a buggering incident mixed with a lot of 'lets play a game so I can fuck with your mind for a while'.
After the experiences I have had on the internet with so called people - I have come to the conclusion that trust is a thing that should be given sparingly.
Now I get sexual attraction and how powerful a motivator that
could be - however I can tell you that visual cues alone (*pictures* do not determine attraction and compatability. Things like scent, tone of voice, how a person fills the space when they are standing there - these can have a much more profound impact on sexual and other compatibilities.
As for being a private person who doesn't sent your nude selfies to any person who drops you a text message - the reality is that is the safest and most sane way to deal with life - safer and more sane is to not take nude selfies at all, and kill anyone who tries to film your having sex with them (after the sex is over, murder just doesn't have that orgasmic pleasure that sex does).
Since you have this shyness/introversion and it is part of your personality and character, hold on to it and don't be ashamed that you feel _______________when _________(fill in the blanks).
Any guy who is going to get in a relationship with you is going to have to like the person you are - not a person you pretend to be because you feel that society demands that you be that person.
That means if a guy cannot accept your unwillingness to play the nude photo swap or other things that is HIS problem. Not yours.