Because I fear loneliness!

因为我害怕孤单！

youdao

I have so many friends, but deep down, underneath, I have a fear of loneliness.

我有这么多朋友，但是内心深处我还是有一种对孤独的恐惧。

《柯林斯英汉双解大词典》

You want to fill all the lonely moments, Lord, and turn them into times of incredible delight. May I never fear loneliness again.

主啊，你能填补所有孤独的时刻，能将孤独变为极大的喜乐。愿我从此再也会不惧怕孤独。

youdao

All I could do was tell her some of the climbing techniques I'd relied on to help manage the fear and the loneliness, and listen to her anger and bewilderment as she climbed it now herself.

NPR: Waiting and Dreading: Families in War Time