Interesting question because most, if not all, questions related to properties involve the husband getting scared of losing his properties. The answer, however, is the same. It appears from your brief post that the properties were purchased by you from your own monies or belonged to you or were inherited by you, prior to the marriage. Whatever the case may be, what is relevant is that your husband did not contribute any monies towards the purchase of these properties. If that is the case, you have absolutely nothing to worry about your properties.
Some advocates and/or non-advocate smart asses like me -:) may ask you to transfer the properties to your family members or sell them. Do not do so. That will create more problems in the future or incur unneeded losses.
Your spouse may be misguided by his advocate to not go in for a mutual consent divorce by misinforming him that he may be entitled to some share in your properties. This misguidance will drag your case for a long time - precisely what all advocates want. Or your spouse may be upset, for whatever reason, and will simply not agree to a mutual consent divorce. If so, be ready for a long drawn-out battle.
Obvious advice: If you can afford it, which appears to be the case, just waive your right to maintenance and see if he is willing to consent to divorce. Give a deadline saying that the offer is valid until so and so date. Do not put this offer in writing under any condition and if they are willing to accept it, ask them to draft the agreement with this condition. This approach appears to be your best and safest way to get a win-win outcome, whatever the reason for your change of heart may be - to seek a divorce.
Mutual consent agreements have to be drafted very meticulously and intelligently to avoid future hassles... thats a whole different topic.