Yea, J. K. Rowling finally let his dead body out of the closet.

"Dumbledore fell in love with the charming wizard Gellert Grindelwald but when Grindelwald turned out to be more interested in the dark arts than good, Dumbledore was terribly let down and went on to destroy his rival."

"Falling in love can blind us to an extent," she added.

Someone help me!
Could it be that Dumbledore was in so love with Professor Snipe that he was decieved into believing that Snipe was on his side? "Falling in love can blid us to an extent," you never know.
So afterall, Snipe is on the dark side…

Wait, could it be that he was in love with You Know Who?
I smell spin off stories…"Dumbledore, the young man you didn’t know", or "Before sunset, a love story between Dumbledore and ‘You Know Who’ "…
Now I really want to get the last book and find it out.

Great marketing strategy, Ms. Rowling!