I think this topic has not been discussed in this part of FM.
And there is no sin upon you if you openly propose marriage to these women, or you keep it between yourselves. God knows that you will be thinking of them, but do not meet them secretly, unless you have something righteous to say. And do not consummate the marriage until the required interim is reached in the Scripture. And know that God knows what is in your souls, so be aware of Him, and know that God is Forgiving, Compassionate.
The Qur'an says that about marriage proposals. Let's discuss how it diverges or converges with current practices, traditional (hadith/regional customs) or secular.
One thing I do not find is that the Qur'an does not say anything about getting families involved. Or rings and ceremonies.