Can I ask for some rather specific recommendations?

Closest thing I can think of is I love Amy

https://www.mangago.zone/read-manga/the_world_without_you/

they haven't known each other for a long time, but I think it fits the other criterias!

Wait- I forgot about this one . Thanks for reminding me ^^

Thanks ! It was amazing haha. I just caught up to it . Kinda craving for more rn. Can I ask for more suggestions?

https://www.mangago.zone/read-manga/free_in_dreams/

If my memory serves me right, both of them are mutually obsessed with each other; I haven't read until the latest updates so I may be wrong!

https://www.mangago.zone/read-manga/the_promise/
https://www.mangago.zone/read-manga/dreadful_night/
https://www.mangago.zone/read-manga/cloud_1/

This manhwas isn't really the vibe you're looking for, but if you want to scratch that obsessive ml itch— I'd say these are pretty good.. imo tho lol

Thanks again!

Oh yeah I haven't caught up to dreaming freedom either but I heard in the latest chapters they have tamed down the characters