6 years for me.
Rg13.... You will know your first love when you understand what it is to truely hate that person for a while.
For you can not hate someone until you have loved them very much.
After time you release that they are the same. If your lucky and move on.
Oh the first truely broken heart. Good luck man. It really hurts. Hopefully you experience this in your early twenties not when your at middle age.
It will help you with your life long partner. As you will not be such a stubborn ***
and release that you love someone very much and need to show it every day.
It can be as simple as a brush of two hands. But when you are both in love the meaning is there.
it is a hard thing to have two people at the same level....
I do believe those who truely love each other know this and make it through the times when the sine waves are not over lapping but at opposites.
P.S. Find some one who has passion in something. Make sure it is not what you have a passion in. And learn that passion it is a great adventure.