I am lonely and I am hurting.
我很孤独，也很痛苦。
She lives alone and often feels lonely.
她孑然一身，常感到寂寞。
He trudged home feeling lonely and let down.
他步履艰难地往家走，感到孤独而沮丧。
He dines alone most nights.
大多数晚上他都独自进餐。
I didn't like being alone at home.
我不喜欢独自在家。
He felt unsafe and alone.
他感到又危险又孤单。