One to watch - I would say. Do nothing is not the best policy, intervention is a bit strong but then 5 e-mails a day is a bit strong. Needy is not strong enough IMHO. If the e-mail replies came from both of you it might find a new level.

I have seen this to a lesser degree with an girlfriend and a sneeky man. I made sure he knew where and who I was and waited for him to blot his copy book. Which was not a hit-on (as it happened), he just didn't repay kindnesses and then it was the end of the story. Mind you I should have got the women in our community who knew what he was like to put the boot in - it would have saved time.