根据短文意思和所给首字母，写出一个完整正确的单词。

    We need friends when we play and work. If we have friends, we'll feel happy. If we have no friends, we will feel l. But what is Forever Friend? When you're down, and the world s dark and empty, your forever friend cheers you u and makes that world suddenly seem bright and full. Your forever friend gets you t the hard times and the sad times. If you turn and walk away, your forever friend follows. If you lose your w, your forever friend guides you and cheers you on. Your forever friend holds your hand and tells you that everything is going to be okay.