Relationship Energy

So I was talking to a girl I went to college with last week, and as with most of my conversations with women in my life over 30, we discussed being single. Why are we single? What are we doing wrong? Why are men horrible? Are we ever going to get married? Should we just give up? You know, the typical panicked woman over 30 questions.
In this conversation, my friend tossed up a lot of reasons why she could be single. But what she didn't mention is what came through loud in clear through the convo without her knowing it: she still has a crush on her college crush. And you know who the college crush is: the man you had such an amazing chemistry with that you and everyone else but the crush thought you were going to marry. I know first hand that these crushes are hard to ditch. I had a laundry list of them until I was forced to abandon them. I mean, I really had no choice once the dudes got married.
Are you someone that believes in energy? After hanging up with my friend I came up with a reason why she may be single that was not thrown out during the call: perhaps she is still so emotionally connected and invested in this crush that she is giving off the energy that she is in a relationship to single guys.
"That's not it," P said when I ran the theory past him. "Men don't even think like that. Single men try to get with women whether their energy is telling them that that woman is with someone or not!"
I'm not so sure. I can't see a man that is serious about relationships and the prospect of getting married wasting time on a woman who was giving off the energy that she is with or in love with someone else.
So how do we cleanse ourselves of this "with someone but we're not" energy? Child, this is the million dollar question. The simple yet not so easy answer would be to just move on. Maybe get some of those energy crystals that everyone is talking about. All I know is that no one can occupy a space that someone else is already in.