It's sad to look how "friends" just stay with you when they need something you can give them, but when you need they just be bedside you an say "Hey! I'm here, you can count with me ¿ok? Never forget that" And it's hard to see how they know they can count with you, but you can't tell them "I can tell you something? It's very important for me, maybe you can help" Because you are they friend, but they are not your friends. But it's ok, because chocolate makes you happy, music understands you, Word hears you, books make you forget those persons and your pillow hugs you.
In my opinion, that's the key of the happiness, love the persons and be nice with them, but don't need them to be happy, because nobody can stay with you forever, even if it want, is impossible, so is better to be glad alone, the pepople can hurt you, but you can carry on needig firstly your own help.