I loaded the game up to check while looking at this as it turns out my memory was wrong, either the love points (for Carol at least) were reduced as part of the remake, or I'm misremembering. Either way, I have 53 relp and 1 love with Carol (I thought I had 2 or 3 love with Carol...).
Checking the script, you can get the Carol love point relatively early on, it's during a conversation in your room, if I'm not mistaken:
View attachment 4818904
So it's nested in another menu choice, but if you say you forgive her, you get +1relp, then after that, you can say you love her already, and you get +1relp and +1love.
I know I had a couple of girls with three love points on my old save from before the remake, but it looks like there aren't as many available now. I'm sure I had three for Roxy too, but it looks like only two are available at the moment, while there are four opportunities to pick one up for Rachel.