Good question! This question shows you are being reflective about your experiences, and that is how you learn. Keep at it.
The diagnosis of 'the problem' cannot be simple, but certainly can be done. My first target would be to look at how you act in the relationship early on. Some questions: Do you let girls "in" to your life really quickly?
Do you make girls the center of your attention and planning? Do you focus on them and pay less attention to your friends and her friends? I used to answer 'yes' to all three of these, and it would have the same effect - things would fade in a matter of days.
Why? Think about it in reverse. If a girl suddenly made you the center of everything she did, wouldn't you wonder if she had her own life?
Her own friends? Or if she would become dependent on you really quickly? Perhaps that is their perspective of you if you answered 'yes' above.
Let's start there - let me know what you think and we'll go from there :).
You can call it "crush" if you like. That's why you lose interest in girls after some days. And if a girl just want to be your friend, then let it be there.
You will know when you see the right girl. You will have that feeling of "yes, this is it".
This is because you have not met the person who is right for you. Right now, you sound like someone who is more interested in the idea of being in love than in actually being in love. That's why your feelings fade, and it is probably why girls realize that it's not actually them that you are interested in, but in what they could represent.
When you find someone who's absence causes you to suffer, then you will be on the right track.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.