The hard thing is, that I know how is to be in love, but I also know how you feel, cause for a long time I was just like you. Empty and lonely. I tried to ignore those feelings (and this make me feel like the all thing is ok), until I fall in love for boy in my new class. I cant tell you whats triggered this feeling, its just happened. Now, the all thing pass and I feel more confused, empty and lonely them ever. But I think that is just part of being human, cause after all, we all are separated of each other, tried to search that "missing piece" that will us feel complete.