Ok, to start, I live in Georgia, and I have friends in Maine. There's this girl I've been talking to online (met her last time I was up in Maine) and she really wants to have sex. I haven't been laid in a year, so I played it up like I wanted to come up and see her and "have some fun"... then I saw her pictures, she's pretty chubby. I know people other than her in Maine, and I wanted to make a trip up there anyways to see them, but I really don't want to have this girl all over me when I'm up there. I've been mean leading her along like this, but how do I tell her nicely that I've changed my mind? And is it even the right thing to do?
It is best you tell her that you do not have those feelings for her. It may hurt her, but it is better then doing something you do not want to do.
I pretty much disagree. Well, at least I wouldn't be so blunt. I like what someone else said, about telling her you have a gf. Maybe if you're on an email kind of basis write her a final letter would be in order, make it sweet and comforting, and even tell her you still think about her and won't forget her but you have to be faithful to your new "gf". See, people so blindly value the truth. This is DEFINITELY a white lie situation. At least in my honest opinion.
Unfair? No, you're not really required to sleep with her. Just let hr down gently. The GF thing'll work wonders.