God calls us to love certain people in a special way, not to universalise love. The bond between those who are married is expressed in an exclusive way that must not be expressed outside the bounds of marriage. My duty to my children is to discipline them. That is an office of love. I am not at liberty to discipline everyone. Simply because you are single is no reason why you can't understand what is entailed in being married and having children. I think you need to give that more consideration so you can gain a fuller view of the situation.
You are mentioning this but not in the context of Jesus expressly saying there will not be such vocations in heaven. This means, that there is no need for marriage in eternity, and thus, negating especial love is what God intended. Otherwise, why could marriage not continue in Heaven? The context about supernatural, directly points to what Jesus was answering in the question relating to his natural family, and rebuking the natural consideration for something that supersedes familial ties. He is reversing the natural especial treatment, as to say, "we are raised to believe these ties are the closest, but what ties are actually the closest, are those relative to eternity." If you fail to see how parents not having children, children not having parents, spouses not having spouses, are spouses having multiple spouses, was not answered in Jesus' response to the question on marriage; I think you are purposely ignoring it. Parents, children, spouses; all stem from marriage. Jesus annuls the root and says that we will be like the angels in this regard. Yes, those ties that survive, will survive; but I don't think there is going to be an especial love for those earthly ties. Instead, the blessing of eternity is the realization of the entire divine family, the obtainment of perfect love, and temporality given over to immortality. So that, the shadow we now have with familial and marital ties, is the love we will have for God and for our real family, i.e. the saints; as eternity quickly surpasses the vapor we now live in.
There is a reason marriage ends. What do you think that reason is? No need for children? Surely that cant be it. And again, the reason it is hard to have these conversations with people that are married, and with children, and are parents; is they have a tendency to think these things are the epitome of life. I would push back on that a little. Not because I am not married, nor have children; but because Jesus says those things are temporal. There is a reason for their temporality. This also makes me want to push back on the idea that Jesus would forbid marriage in heaven, but make it so formally married people are especially loving each other in a way that mimics marriage absent of the physical intimacy. Such a marriage could exist if that were the intent.
My point, is that marriage, though while serving a present purpose, and a very good purpose; also often times creates a dependency. One where someone can tell you flatly "Jesus is enough" but the thought that we will not be especially loved by our former spouse, when we will be loved by Jesus, or could be equally loved by all the saints, is still a disappointment. There is a longing in us to be special, or to be especially recognized, even if it is only by a single one like us. And I think this is the fright of all those who would cling to especiality as opposed to universality in eternal love.