There is no sin on you if you hint as a proposal to the women or conceal it in your hearts. Allah does know what you will mention to them. But do not make a promise to them secretly, except that you speak in a recognized manner. And do not resolve upon a contract of marriage until the prescribed time is reached. And be sure that Allah knows what is in your hearts. So, fear Him and be sure that Allah is most Forgiving, Forbearing.