She does not exist
What you are saying is fine, however the day when you meet the girl of your live will come. You are feeling like that because you have not met her yet, and when you do, she will eclipse the rest. You will move other girls apart because of her.
I have heard words like these several times. People say them to me in response to my rejection of sharing my life with a single person.
Long time ago, during my first long term relationship, I thought that my girlfriend could meet other boys and do whatever she wanted with them. My unique request was that she did not stop to love me. When I told she so, it brought a lot of drama, cries, and "what you really want to do is to fuck other girls" similar sentences to our relationship. Partly it was true, I wanted to meet other girls, or at least to be allowed to do that. However the main reason was different. I had been seeing how other relationships failed, so I supposed that our relationship also would finish soon or later. I did not wanted she wasted her time spending it only with me. And it was principally about her, in those times I was really focused on my career.
Well, after several up and downs our relationship ended. When we broke up I had not stopped loving her, we did it just to be separated, and she still remains in my life. Fourteen years have passed since I met her, and she is still one of the most important persons in my life. To desist loving her is not in my plans.
I have met other girls in the last years. Some of them have gained a similar significance than she, for all of them I wrote this post. Some people freaks out when I talk about my beloved girls in plural. Usually this people do not understand that my feelings for them are similar to the feelings that monogamus people have for their partners. So when I declare my position about monogamy those people usually answer like I wrote at the beginning of this post.
I strongly reject monogamy for me. It is because I do not believe in the existence of a person who is my counterpart at one hundred percent. We are all different people, and everyone else can give us balance in different ways. Inside of us there is not a puzzle lacking of a single piece; believe me, we are completed by our own, and we can find a very glad feeling when we link ourselves to other people.
Then it is clear that there is not a better half of me wandering the world looking for me. There is not a unique person who could make me feel happy, and to search for her is nonsense, is frustrating, and is even harmful. The same happens with relationships, to rely my emotional stability, time, and energies in a single person has no meaning. I do not want to worry about trifles like if that person smiled, killed, or fucked with other guys.
Sometimes people doubt that my feelings for those girls who are close to me was love. It is obviously love. What I feel for them is a great feeling of joy, which I can clearly distinguish from friendship or simple affection. Those girls bring to my life a lot of good things in such different ways.
Love should not be exclusive, or at least is how I see it. And I like to feel love in this way. So when somebody mentions the girl of my life I have to affirm with determination that she does not exist.