I think that is an important question to ask until the day you stand at the alter and say "I do". It is so important to be open to what the Lord wants and realize that we could completely miss His Will because our own desires got in the way.
For me I thought I knew my husband was the one a couple months after we met and I made sure I had confirmation constantly as I said even up until the day we got married. Don't get me wrong I don't mean I was ever doubting but as I said above, I was always open to the fact that God could reveal something to me that I had missed. Praise God though he confirmed it to me constantly through the word daily as well as the wise counsel in my life.
I hope that makes sense

.