One thing; no matter how close you're to a person, or how close you think you are, you will be forever nobody to him/her, unless he/she shows you how important you're. You should have stopped appreciating people, rather consider them the way they should be treated.
You can give a huge present on someone's birthday and you gained nothing on yours. You might really be there with the struggle whenever someone needs you, but you are alone whenever you are down.
and you might come to someone's party, as a guest, or as a friend.