<human>: Can you condense the text into a few key points?

Hi, I am a single male who has not been photogenic at all since my teen years. I believe I'm moderately good-looking when I see myself in the mirror, but I look terribly awkward and unattractive in still pictures. It tends to destroy my self-confidence. So, I actively try to avoid taking any photos of myself. 

This wouldn't be a huge problem, except Facebook. It seems all my friends are taking photos of each other and sharing and tagging and liking them all the time. It's one thing that I find really disgusting about Facebook. I have never used a real profile picture, and never uploaded any photos of mine. But I can't stop others tagging me in photos they have taken of me.

 How do I refuse to take group photos in social situations without offending others? Anyone has been through a similar issue? Thanks.
<bot>: Unphotogenic person hates it when others tag my photos on Facebook. Need to find a polite way to avoid this situation.