Having been in love/crush so many times in a few years just means you have alot of love you want to put out to the world. Its misdirected towards the past and the unavailable, but its real. Brooding over someone is a natural feeling but you just have to tell yourself out loud that you need to move onward to new romances. I realized my value as a loving person that could make someone happy one day and moved on after brooding for a year over a girl. Time definatly helps as long as you reinforce it with wanting to find someone new.