Is it 'how to raise a victim'?
Omigod u are amazing. I think that's it. It's been a few years but it looks and sounds right. I didn't have it saved on my list which is why i couldn't find it.
I know cuz my phone got factory reset once out of nowhere and I had to search my bookmarks ALL over again. Good for you, make sure to save it properly this time. Try reading Global Examination if u can. If you have already read that, go read Kiss the Abyss.
I also recommend 'I have to be a Great Villain ' unfortunately no novel version is available, but it has an amazing plot, I'm marinating for more chps. It's kind of hard to understand in the beginning, then later the pieces all connect together. If u want some good interactions between MC & ML, it's great.
I usually save before i even read. But it's been a couple years and i must have never saved it despite being at least a quarter of the way in(it felt like it at least) I've looked for it several times thinking i had to of saved it somewhere. If u see the number of things i have saved you could see my issue
I think it MAY have been a isekai or isekai like genre. Maybe reliving life again and again situation? Videogame like? I want to say the main character fell in love with a servent/butler/assistant. Main character was like the only one "aware" and i believe the love interest starts to become "aware" as well. I think there is suicide at some point right in front of the love interest which shows he has feelings as well.