What to say if you are afraid to go to sleep or feel lonely and depressed

((أَعُوذُ بِكَلِمَاتِ اللَّهِ التَّامَّاتِ مِنْ غَضَبِهِ وَعِقَابِهِ، وَشَرِّ عِبَادِهِ، وَمِنْ هَمَزَاتِ الشَّياطِينِ وَأَنْ يَحْضُرُونِ)).

aʿoothu bikalimatil-lahit-tammat min ghadabih,waʿiqabih, washarri ʿibadih, wamin hamazatish-shayateen, wa-an yahduroon.

I take refuge in the perfect words of Allah from His anger and punishment, and from the evil of His servants, and from the madness and appearance of devils.

once