and having just said that, more than likely, you are too young to know who or what she was. Let's just say: I have had quite a bit of practice in this area since I seem to fall in love quite easily.
I think, he is gun-shy after having ended a 3 year relationship. I would email him back and keep it LIGHT. Mention that you were the one who spoke with him at his place of work and just had to say HI, how are you doing, nice to have met you, blah, blah....again, keep it light and friendly, not overbearing or in "hot in pursuit" like a car chase on tv.
Then, this is the hard part, after you show him some kind of friendly interest, let him sit with that for awhile and see how he responds. If he says HI back and you get to talking he might actually feel more comfortable chatting online.
We women are such wonderful creatures of getting what we want. If you play this right,
and "love is a game", he might respond the way you would like and you could be on the start of a new relationship. However, the first few meetings are to be handled very light-handed. Once, he shows more of an active interest, he will respond to more warmth. Think of a candle's heat vs a blow torch. It means putting the brakes on at first but as he shows more interest than you can ease up and allow your natural warmth to come through.
How do I know? Well, let's say, I have never been a bridesmaid, always a bride!
