Well, the title helps so much now, doesn't it?
From the average Looking for posts it seems like you people here at DLP knows which fic someone is talking for by simply mentioning a word from it, heh.

So, let's see, I can't even remember if the fic was good, but the most obvious thing was that Dumbledore did something to Harry that made him switch sides..
The thing is, he had done the same thing to Tom, hooking him up with a girl to show him the power of love or something, using a love potion I think, but Tom overheard his "girlfriend" and Dumbledore talk and killed her later.

Sorry I don't got more, it's been a while since I've read it :/
I hope I didn't screw up by making this thread here, it seems like I should post a new thread looking around the board, and not use the thread, but I'm not to sure, since I am new here. Oh well, that was pretty much all I wanted to say.

 

You didn't get any replies because there are like a million-billion stories like that. And they almost always suck.

 

I recognize the story...I just don't know which one.

Oh! Maybe it's "Flames of Betrayal"? Not really sure.