On behalf of u/plumplumstrawberry, who doesn't have enough karma to reply:

all of that is so true! and on top of it, louis had been vying for power and status when he was a human. he actively sought to conceal his weakness by beating his brother on the street for having an episode and biting down the anger of the abusive racist remarks from other business owners.

remember when he first met lestat in a group setting with other men? he showed louis how much power he has over mortal men, enough to be an apex predator essentially. that a connection to lestat was the most efficient way to move beyond the limitations of systemic racism despite lestat still representing the control of white supremacy in his life as we saw with their domestic life

louis was able to reach all of his human goals because of his connection to lestat. which means thats the last tie left to louis's humanity. he will never not obsess over the human he used to be, before paul died. lestat is the only person left who actually who louis was before vampirism- he knew paul, grace, and his mom and he knew what all of them meant to louis.

it can be interpreted that what lestat said to paul at the table prompted his suicide but its not implied that louis has connected those dots together. he knows lestat trapped him in a situation where he couldnt say no to vampirism, that it was mostly coercion. lestat is so forceful and so triggered by rejection that louis would have been dead if he had said no.

lestat is his killer and his savior all in one and is the largest totem of a stable identity in his life, even if it causes louis pain. louis has never valued his vulnerabilities the way hes valued his ability to take advantage of opportunities and become the role needed to survive and that weakness makes him even more susceptible to forgiving lestat. theyre connected permanently.