I had a similar problem for awhile, I think the guy got bored.
I once looked at my GF's email, it's how I found out she was cheating on me...she had her passwords written down and filed under "secret passwords"!
She started seeing a programmer on the side and he had some kind of program (we think) that can run thru all the words in the dictionary untill it opens your email.
her and I are friends now but live in different states.