A brief summary of Eleonore Stump's view of Hell.
A loving relationship requires two people, both willingly entering into that relationship. You've had this happen in high school. You really liked somebody, but they didn't like you back. They rejected your love (or high school lust, rather, but you get the picture). So God and creature requires similar. God wills a loving relationship, but he cannot force the other person to love him back. That person needs to willingly choose to love God of his own volition.
Now, a person in Hell might say "Holy shit! It's hot! I changed my mind! I want a loving relationship with God after all!" But that person is acting out of self-interest. They are not any more interested in a loving relationship now than they were before; they just want out of Hell.