What are the chances that you would be able to see your ex? If there is a possibility that could be the reason for the dreams of her. Either that or you are doing a real good job of staying away from her. Even a hint of hope can either create havoc or some peace.
I suppose it is remotely possible that I could locate her. But I would not do that for several reasons. 1st I wouldn't want to bother her. 2nd, it would be too rough on me emotionally, unless she contacted me and wanted to see me. I'll tell you one thing, however. I'd literally give my left arm just to sit with her and talk. There is much I wish to say. I never felt like there was any closure. And that has eaten at me for 25 years.
You could search online and contact her electronically, just don't be upset if she doesn't respond. A text or email, or even a Facebook friend request probably wouldn't hurt anything. It would just let her know that you are thinking of her. I guess you could've sent an Easter card (either email or paper) if you could find her.
It is nowhere near as easy as people think to find someone online. I once tried to find a friend I had in my 20's and it was impossible. A name is NOT enough. Even with a birth date, it is STILL not enough. How much harder would it be to find a woman who has changed her last name ? Perhaps if I was willing to spend thousands of dollars and hire a detective agency they might have a chance.
Oh she can be found. I was a skiptracer when I worked for a collection agency and there are so many ways to find someone who didn't pay money owed.