The Bible says that love “hopes all things. ” It is not wrong for you to entertain the hope that your loved one will return.
وَيَهْوَهُ يَقْبَلُ تَوْبَتَهُمُ ٱلصَّادِقَةَ ؛‏ فَهُوَ إِلٰهٌ « غَفُورٌ » .‏ —‏ مز ٨٦ :‏ ٥‏ .‏