Why do you love someone so much that you miss him all the time

for me it is because that person i love brings me laughter and comfort whenever i am around her. shes the only one i can fully trust and i love being around her. i love the laughter, the silences, the arguements i have with her. i dont know how i can like so much about her. its like whenever im around her, i feel like i found a place where i belong, someone that can truely understand me. without her, i feel alone and left out; the loner i was before i had met her. it is just the comfort we get around that special someone unlike anyother person in my opinion