They tell us that when it is it – you ‘just’ know.
But you don’t know it like you do the answer to a trivia question or what you had for breakfast this morning, or the name of your first pet or even the definition of the term ‘best friend’.
You know it like you know your native language, or like you do the position of the tip of your nose in relation to your index finger (yeah, try it out, close your eyes and you will always get it right!).
Any attempt to rationalize it, is futile in essence.
Falling in love is probably as far away from rational as you can possibly get.