
Any suggestions for where ml, who hated mc at first, fell for mc eventually, but mc is madly in love with another person. Just like "Form of Sympathy". Can be straight or not. Thanks!

Hmm, I know a BL that has the same "psychological" aspect and vibe of "Form of Sympathy", but it's the other way around.
Instead of the ML who hated then fell in love eventually, it is the MC. While the ML has problems of his own.
If you want, it is CHECKMATE (TAN). The uke is not weak here, which I like, he's quite smart & clever I must say.
CAUTION. They're both crazy toxic in their own ways, but it's a good kind of toxicity that will make u smile Hence, the reason why they are meant for each other.

Do you guys know any bl where uke is in love with seme1 but is mistreated by him so he ends up with seme2. I've already read black lotus so maybe somethinf similar to that. thanks :)

have you read this one? https://www.mangago.zone/read-manga/doronuma/
It was bl. I remember they had a tent in a park and they were doing 'it' inside. They were audible to the people outside lol they also brought their kid with them but he was outside, playing
pretty sure your talking about love in orbit
It kinda sounds like a scene from Love in Orbit, but it wasn’t their kid. Gabin was just drawn in a Chibi-esque fashion, but he was college-age.
That specific scene happens in chapter 13.
https://www.mangago.zone/read-manga/love_in_orbit/
That's right! Thanks!
Thanks!