Another one for yogagirl
I have mentioned this is from experience but neglected to tell you the experience.
In my case, it was a chap living nearby who was just amazing and we got on amazingly, great sex and chemistry, great conversation, a definite 'connection' etc etc. He was also gorgeous and totally my physical type, 6ft 4, great body, own business, intelligent, etc.
Anyway I was seeing him for about two months and I wanted something a bit more definite than just 'seeing' but his excuse was he was only just divorced, and a bit messed up.
So, i was patient, two months turned into about four, and all the time he kept me at arms length even though everything was amazing between us when we were together.
I finally cracked and sent him an email that said something like look, I don't want you to move in or anything like that but we have this amazing time and you have previously said we have a great connection and all that, and I was just asking to be in his life just a tiny bit more.
He replied agreeing with me again that we were great together, but he was having a hard time and going to the coast for a few days to think.
I gave up at that point. Six months later after no contact at all he got in contact and I forced him to tell me what the fuck that was all about, what was the real problem, cos it sure as hell wasn't me.
Turns out he had been seeing his ex wifes best mate the whole time I was seeing him, keeping it secret due to the divorce, and they were now officially a couple and very happy. They are still together, see them about sometimes now - this was ages ago.
But anyway my point is that after i had my last ditch effort to allay his fears I was fine. It became clear when he dodged it yet again with more crap that he really wasn't that into me despite what he said and how he acted etc.
I'm really glad i eventually got the real reason out of him, but I was fine anyway and looooong over it by that point.