wooo you need to try black mirror. That's probably the best psychological bl manhwa.
https://www.mangago.me/read-manga/black_mirror/
Hey… https://www.mangago.me/read-manga/16647/
This is actually peak I love love best part is that they actually like each other… viewer discretion advised but straight peak in my opinion.

i just finished killing stalking i love it sm pls pls lmk any other mangas/manhaus that r similar!!