I'm going to come to the defense, a little bit, and also chide the poster.
1.) The girl taking your shirt, not returning it or contacting you about it and letting her dog play with it is wrong.
2.) You would have been fine with your post had you not done two things
a.) placed a link to her ebay page, which allows people to identify who she is.
b.) and most criticially, placed a picture on the Internet of her.
I didn't go back to see whether you put her name, but if you did, that is a total no-no. Many of us (myself included) bitch all we want but have the mutual respect not to place people's name on the Internet, lest they do the same to us..
Doing two of those three things and calling her a 'psycho' can be seen as libel and she deserves to be able to defend herself..
It is no surprise that she came after you in full speed. Had you just talked about the story and not posted personally identifiable information, no body would have said anything different.
Point #3. ) Your friend sucks for ratting you out.
Point#4.) If it's true you have a gf, and you would object to her trying to sleep around, you suck :tongue:
Kind suggestion: Tell your gf you're sorry, tell the girl you're sorry but that she shouldn't have sold your shirt nonetheless, and delete all personally identifiable information from this post about her (if it's still here..)
Good luck!