If you had any type of real connection whatsoever, even if you parted on bad terms, you will very likely cross her mind from time to time. This doesn't mean that she will contact you or act like she cares about you. Things are often not what they seem, and even though it is best and healthiest to move on, it is actually a common but inaccurate thought (in my experiences and observation of others) that someone you were once close with will never think of you again. It's just that in some cases, you will never know about it, and it will never lead to any action.

But rest assured that a little, tiny piece of you will be carried with them forever. Whatever experiences you did share with them, it wasn't for nothing, and it became a part of them just as it became a part of you. Some people are less able to appreciate that, but it doesn't change the fact, either.

In my experiences and observations of others over the years, nearly everyone has at least one person from their past that they still think about from time to time. And sometimes it is really small, random things that will make them think of said-person. But of course, the vast majority of these people have their reasons for feeling like the past needs to stay in the past.

So I think a possible big part of healing and moving on, is in realizing that many things go unknown and unspoken, but that doesn't by default mean that those things, those thoughts and feelings, never existed or never happen.

And so furthermore, it's just that there are a lot of lonely people out there, a lot of potential friends, a lot of people who would click with you and who could share a mutually enjoyable bond with you. And we go through life experiencing these bonds, some longer than others. And they all mean something, and they all become a part of the people involved.

You've gotta pull your eyes away from this one person, see the forest for the trees, in this case the one specific tree you're fixated on. There's a crap-ton of trees and some of them are waiting for you. Moving on to other trees doesn't mean the previous trees are going to forget you.