I just read a book (Looking for Alaska by John Green, in case anyone was wondering) and it makes my cry every time, even though I've read it before. The thing is that I know what real love feels like, to love someone more than anything in this world, more than you love yourself or your family, because this person is your family (this might seem silly to you and I don't want say I don't love my family, but this is a whole different kind of love). If I wouldn't be in love or haven't felt this feeling before, I'm not sure I would cry reading those books. Its all about feeling with the characters.
I had to write this down, sorry! x