I think Ash should move to a different country.
or state.
Or city.
Where there are no freaky/stalker guys that will follow her and try to pick her up and ask for her number and tell her that they like her etc.
it dosn't hurt to email him , just email him and see what he says, if you see him again you can't always go making up excuses why you havn't contacted him.
He seems keen, at the same time be careful though.