How do you move on?

Most of us savour our first relationship or the longest relationship or the most memorable relationship. But you cant savour every relationship reciprocated or non reciprocated. As per all the bad books on romance and stuff like that its not humanly possible to fall in love again and again that too with equal propensity. Then either its not love or something is definitely wrong with the person, or he/she is stupid. You can be indifferent towards all the jilted affairs, but jealous, hurt, remembering things is so not normal that too about all the ppl in life big or small. All those small little things should have been completely forgotten, ignored, dead and buried now. But there are some ppl who take longer to fall in love and even longer to forget it, even if it means an entire life time. And you don’t even know if it is love cause its with too many ppl, and second it was too short lived. Yes it is humanly possible to fall for more than 1 person with equal obsession. Still remember each of them fondly whenever encountered. And I am sure there is never a person in isolation. Though we all think we are unique in our own way.
But some ppl seriously got to learn, to let the bygones be bygones and move on in life. To understand that ppl move on and so does life. Even though you want to them to cling on to you like forever. I have always believed its easier falling in love then coming out of it. And now I know it for sure. Then why the hell has 3 years not been enuf. How can a person so contradict his own statements? Why do you still feel that pinch deep down in your heart? Imagine, if it is every now and then cause there are hoards. The reasons are never enuf, music, car, blog, places, situations etc etc. And you know you are ancient to the core as if life never moved on and will never do. You hate it, when you know that it still has an effect on you whereas the other side is never bothered, never was and never be.