First of all, let me say, "Great question!" Thanks for asking it.
I am 50 years old and have never been married. This is by choice. The choice was made partly on the results of a traffic accident where I lost my fiance a few days before Christmas when I was about 30. She was killed by a drunk driver. I have lived with other people (roommates, gf, etc.). For the most part, living alone has been okay. When I suffer, I can do it alone and quietly without affecting other people (eg. People at church aren't affected if I have an illness or are down in the dumps as much as someone living with you would be affected.
I am around people all the time.
I teach English as a Foreign Language. I attend church and church meetings several times a week.
My friends are great and I have close friends. I help neighbors when I can. I do work with youth and have housed them for a night or two while the state finds them a permanent foster home.
I have never been an animal person. They are costly, smelly, and stinky. Like others here, if I go on trip even for few a days, I would need someone to watch them.
However, as I do get older, I feel having someone to come home to would be nice. Someone who is committed to you and you are committed to them. Someone who is on your team and together you take on the world and what life throws at you. Someone to share in the disappointments and victories in the game of life.
My only regret is that I have not had anyone nor it is likely to have someone call me, Dad.
So all in all, like anything choice we make, there are good and bad things about your choice. It's not a perfect world; no matter what we choose.
Trust in the LORD with all your heart
and lean not on your own understanding;
in all your ways acknowledge him,
and he will direct your paths.
Proverbs 3: 5-6
God grant me the serenity to accept the things I cannot change;
Courage to change the things I can; and wisdom to know the difference.
Living one day at a time; Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
Taking, as He did, this sinful world as it is, not as I would have it;
Trusting that He will make all things right if I surrender to His Will;
That I may be reasonably happy in this life and supremely happy with Him
Forever in the next.
Amen.
--Reinhold Niebuhr
Thanks for reading my ramblings.
May God richly bless you.