Personally, I think if you are NOT to marry, you would know it.
Marriage was instituted by God at creation.
Men and women are commanded to be married.
NOT to marry is 'against the norm'.
If that is God's will for a person, that will be 'given' to them from God.
We have a lady in our church who has never married.
She is not pining for a husband, but simply serves the Lord in her job and is quite content with her position in life.
I think she has been given that by the Lord.
Just my opinion.
Paul encourages us to be content with whever we are in life
As for marriage he says
Or in other words if you're single be content with that but if you have a need to be married then get married.
There are men and women who have no interest in marriage and that is ok.
There are others who really need to be married.
That is ok to.
But the key is content wherever you find yourself.