Just out of my reach

I have been on a mission of sorts for over the last year. I wanted to learn more about myself, what I was capable of emotionally with someone else. In the past I have been so quick to give myself away, I wanted to learn how to control my emotions and still have relationships with men. So this led to me having guy friends who I can connect with on a level that you can't really do with some random guy. Its really been a learning experience for me. I have learned what I want from a guy. I have learned (for the most part) how to keep my emotions in check. I have found a guy or two that I can just be myself with- be honest, let my emotions show a bit but not at the risk of pushing them away. You'd think that out of the several guys I have dated, connected with, gotten to know over the last year- there'd be at least one that I'd be able to keep. However- no matter how amazing the guy is, how wonderful he and I connect- he remains out of my reach some how. I just can't seem to understand why I meet these seemingly amazing guys- who'd be amazing for me and we would fit so well, but no matter what, there is something that keeps them from being able to be just mine. Here's some examples- not ready for a relationship (this is the most common one), lives in a different city, lives in a different state, still married (though separated) and the list goes on. I'm waiting for the guy who is quite possibly the perfect combination of all of these guys in one- but available to me. There's is nothing more exasperating than having him in my hands only to have him slip through my fingers.