If I were you Petal, I would wipe him out of my mind and start afresh. He doesn't sound like a very nice person, dumping you via e mail. He probably feels all smug now, telling his friends that you want to get back with him, this is how men like him behave.
If he suggests you meet up at some other point, I think you shouldn't go. The fact he dumped you by e mail tells you everything, he's a cowardly, cold ******** who really didn't give a damn about your feelings. You don't need to meet him face to face for him to explain that to you.
Good luck with moving on, also be careful with online dating too. There are a load of lying, deceitful ***** there too.