I've been doing online dating for about eighteen months now. In the last two months alone I have been on about eight dates of which six of them went like this:
Date goes very well lasting hours, some of them some nice kissing, plenty of chemistry on all; very rarely alcohol involved. Text from them after the date confirming they had a great time, really liked me etc. They continue to message as prior to meeting, regularly, initiated by them for about two days, all going well. Then ... 'poof'!! they suddenly vanish never to be heard off again.
I'm completely baffled and I must surely be doing something wrong for this to happen time after time? Even the seemingly nice guys/od virgins keep doing this 
I'm not clingy; I take turns with them after the date to initiate contact. I don't suggest meeting up again but do tell them I thought they were lovely and yes I had a great time on the date too. Not too much contact either, always try and follow their pattern when communicating if that makes sense.
Out of the six I really, really liked two of them; the other four were very nice too and would have liked to see them again (and yes, a high ratio of liking them but I do filter ruthlessly before meeting). No desperate vibes either, many of them commented on how positive, happy and easy to get along I was....
Any ideas on where I might be going wrong? It's so frustrating and it's really bringing me down....