For anyone following this I found it!
https://www.mangago.me/read-manga/darn_it_lilith/
Thanks!
Hello - hoping someone can help me find this as I just can’t remember the name, sadly it got lost from my reading list when all the lists went missing! It’s a BL manhua with the MC who is a ghost with long pink hair and he escapes from the hotel he was trapped in and now lives with the ML in his dorm room. It’s relatively new I think so not ......