When you can afirm someone is the love of your life?

I believe oyu have one love of your life, you can love many persons during your whole live, but how you can afirm a person is the love of your life? Or is just the love of your moment?

Lttile things are the ones that make you notice if that person is the love of your life , It all comes together in a package that will only suit you.
I believe it is when you meet someone who tries their hardest to stick by you regardless of how difficult you are , someone who cares enough to look past your flaws which is someone you will not find on a daily basis. That special person has to make you feel like home.
It has to be someone that you feel you can never lose because if you did you would lose your best friend , your soulmate, your smile and your everything.