what's love?

i was talking to my friend earlier and he posed this question on me, "how do you know if this person is THE ONE if you know youre also willing to go the extra mile for others?" yeah. how do you know? i told him that all that changes when you actually love the person. loving the person means you block out everyone else, you wouldnt even think about doing the same for others. i just realized that this a very divertive answer. 'cause no matter what youll always know that you can do the same for others. i mean, what? so does that like mean there isnt such a thing as THE ONE? like, everyone can be THE ONE? which leads me to his next question, how do you know if you love someone? the million dollar question is, what is love? i told him noone knows what love is. its just like blind faith. you dont exactly know what youre believing in but you just believe cause you know its there. im not convinced by my answer.