Well, God says it is not good for a man to be alone; so I would say this goes for women, also. But ones do not have to be married in order to share with each other while living with one another. I mean morally, and not necessarily a man with a woman.
But, by the way, having a dog or a cat is not the same as learning how to relate in love with another person.
My opinion is God has designed us so we can not make it by ourselves; there always are things which make us so we need one another. But this works especially well for Christians, since in Jesus we are "members of one another" > Romans 12:5, Ephesians 4:25. Members of a body by nature depend on each other. And I think this is so deeper and greater and better in God's love. But this love is not only between two people in a more or less isolated relationship; but we need all our brothers and sisters.
So, as you grow in Jesus you discover how really God has you need others and they need you. Trust God to keep you growing this way.
And so we can feel for others. And what helps is how we learn to live in God's grace which is sufficient for any thing or problem or nicer things and relating > 2 Corinthians 12:7-15. I mean, that with God we find out how He has us doing better and better, no matter how nice or hard things may be > in God's grace, neither hard nor nice things decide how we are and share with God, plus God shares His creativity with us, for using all things for His loving.
And then we can minister this to others who are having problems. This includes how we can minister-on to others how God is comforting us >
2 Corinthians 1:3-4.
And, of course, we are more or less broken and failing because of sin, but we can use even this to help us realize how others also have sin trouble; and we can feel for them, out of our own weakness and failing >
"He can have compassion on those who are ignorant and going astray, since he himself is also subject to weakness." (Hebrews 5:2)
And as we grow in Jesus and gain how God deeply corrects our character so sin things can't get the better of us so much, now we can minister this also to others, with hope because of how God has proven Himself capable in us.
Amen, but we can live in sharing with someone or others, though this is not marriage and it is moral. So, it is good to not isolate ourselves with how we see only our own selves, since we were meant to be joined to one another as members of each other. And we know no member of the body can survive, never mind do well, by itself.
But we see in certain American culture how there is so much praising and valuing of independence; but we also see how deeply lonely ones can become, and isolated in themselves . . . with their problems; but also isolated with their talents, maybe in competing to be more than others, versus sharing and valuing family caring and sharing with others.
So, in case you find yourself not to be very competitive in anything > this can be used to your advantage

Because, among other things, ones who know how to love you will not discriminate about how you compare with others. So, be ready for love