It is not good for the man to be alone. Is man lonely without a woman? Not a sin to make love and have children. Good to for God said so. For man and woman is to be married. The sin is when they are not married and have children. Man is to love his wife and cleave to her. To do differently is sin. Be ye holy and stay with your spouse. Alone is not wrong.
I will make a helper suitable for him. Will anyone do? Make someone he can love. A loose marriage leads to sin. Helper can only be found within. Suitable man and wife loves each-other. For this is the perfect will of God. Him who finds a perfect wife finds a good thing
Genesis 2:18 ► New International Version The LORD God said, 'It is not good for the man to be alone. I will make a helper suitable for him.'