Loneliness. It can cover your whole mind making you feel empty. You could be in a room full of people and feel surrounded by a darkness that covers you and your heart feeling there is no way out. You yearn for a something to change the rutine someone to make you feel loved.
You might want to give up but you gotta keep on fighting because it's worth it. If you just give up everything will be in vain, you will make people suffer for you and you will turn into a selfih masochistic.
Friends, family, lovers, everyone can make you feel that emptiness by hurting you , they might not notice but a word, an expression can tug on your heart draining very last drop of life in it.
How come that a simple laugh erradicates that feeling then? How come someone make you feel like your heart could burst otu of your chest?
Love.
It can be romantic, fraternal or towards a friend; either way, the key to dissolve that feeling of nothingless comes by someone making you feel loved.
That is why Jacob was like my portable sun, always making me feel more loved than what I diserved.