The truth is, you get used to it.
Over time, living single and alone eventually grows on you. You chew your food longer for lack of dinner conversation, sleep more soundly without a chatty someone stealing the covers, cuddling, or wanting something more. You save money on silly flowers or something special for no one special for no special reason, and you learn to be self-sufficient when sick, make your own soup and get your own toilet paper. You no longer worry about dying alone, just dying, and gradually forget the memory of a mind-blowing kiss, hug or the unexpected touch of a caring hand. Truth is you get used to it because it grows on you as an annihilation of everything that might have been, drawing the devoted heart, mind and soul closer to all the good things in this world and in your life that actually are.