Here's a thought... you may have actually developed false/confused feelings for her because you feel as though she's the only woman you have ever had a chance with... perhaps it's simply human survival instinct to want to pair up with the only woman you feel is viable. Thing is, if I'm right, you should know that she is not the only woman... in-fact, she is no longer viable; she may never have been viable.

It does sting, ... when I found out my last ex was married, it stung like a female dog, but these things happen and you have to just move on from it; no other choice.

Clinging onto these feelings is unhealthy for you. It gets easier over time, provided you're not still clinging on to something that isn't even there. Do you really love her? Or do you just love the idea of being with someone? I'd really think about it, if you haven't done so already.

Misguided feelings are messy, but once acknowledged, they can leave as quick as they came, at least in my experience.

I strongly suspect that this is what has been holding you back from moving on. Other women may have sensed it.