In my understanding, love in the context of God (as that’s loves essence) should be in the level of God, for love is of God as God is love, like scripture states.
I would say that even the natural affection you have comes from God also, from love, as God is the creator. The difference I would say, is that the “natural affection” doesn’t put truly love in it (as God is love, you need God), we don’t see that that “affection” should not just be an affection, it needs to change to be a decision to look for the welfare of the other. Love is charity, selfless acts towards the welfare of the other, towards was good for the other. Good is not what we think is good, but what is good for someone’s spirituality and what helps for the union of the other toward God. The natural affection stays or can stay as an affection only, but when God is in the equation it should elevate that affection to love, always (or at least try), or change that “love” (affection) to real love, to this decision to love. Love is not an instinct or a feeling it is the decision to love like Jesus loves.
The possibility of loving God relies in the ability of loving God in the vocation we are in. In the means you do everything with God in mind, referring that you do it in a good way, it doesn’t matter what you do. For example, if you have children, taking care of your children, is in part loving God, if you are a student, doing your homework and studying is in part about loving God. I believe that monks and religious always have chores, Mother Teresa had to take care of the sick, for example. The point is also, remembering to pray, as that is a direct line communication with God, doing the sacraments the way the Church states, and acting your duties in the vocation you are, always honoring God, therefore in a good way and consequently in a loving way, remembering that God is always with you. The point is that we don’t forget what we need to, to do good/love correctly, we need His Spirit. We need to act this faith in faith.
To love God we always need His grace, and our yes to that grace (the decision of our free will predisposed toward God and His ways), through faith and spirituality (faith acting, or acting in faith). To love others works the same way, we need His help and our yes to that help, to love others purely and correctly, that’s why the first commandment is the first, then we are able to love and have to love others like we love ourselves and love like Jesus loves.
Don’t worry much about people ending up in hell, as that will not help. Pray for those souls and act like God wants, maybe His grace will touch them through you. I like what Father Pacwa says, worrying about that is for management, I am on sales. Pray for sinners, for their eyes to open, that’s what Fatima states, our prayers are not in vain, we need to have faith.
I think, we cannot really know how heaven will be, because this world can for us seem to be “hellish” and “heavenish” at times. But even then what we can call heavenish can sometimes reside on our senses being somewhat satisfied, and because the feeling is good, we might think that is “heavenish”, and maybe we are far off. Therefore in my opinion we cannot truly comprehend heaven, but in faith we can believe that if God is the creator (our creator, our Lord who is Good), then He knows, really knows how we can be happy.