He didn't reply me. I really don't understand what is he thinkin.
Could be he considers you unattractive, he got a better offer, got hit by a bus, or just plain embarrassed.
Is it the end of it?
You come across as being naive and vulnerable. Look after youself and try not to breed too much. Maybe develop a support network of female friends to discuss relationship experiences with and listen carefully if they warn you about particular men.