Well, there is no specific answer for everybody to perfectly define 'First Love'. Some people dated so many guys or girls but still, neither of them can be said as first love, there are even people who dated only a guy or a girl, for years, but they don't declare that he or she as their first love.

Your first love isn't always be someone who you dated for the very first time in your life. Not either the first person you love, you hug or perhaps you kiss. Isn't it? For my very opinion, a first love is a person who I would compare everyone to. Even though sometimes I made people tired listening to the same name. I mean you can guess, right? It's the person that you will never truly get over,

disregarding the fact that you've convinced yourself that you have moved on, 

or even more pathetic ; you are with someone new.

And what's my point?

Playing with your own feelings is something risky. You think you are right, you are smart enough to handle this and that, you think that you are qualified and have what it takes. And when you have found out that you are wrong,

You are screwed.

Scared?

You better be.