无人伴我共白头我同他人共偕老
[wú rén bàn wŏ gòng bái tóu wŏ tóng tā rén gòng xié lăo]
This conveys a poignant sentiment where the user laments not having someone to grow old with. The latter half implies the irony of living to a ripe old age with someone else while yearning for the one who is missing.