Are there any other mangas similar to Ouji-sama ni wa Doku ga Aru or 17-sai kiss to dilemma, you know a manga where the guy acts all cutesy to get attention from the girl he likes

Both these tags are only two-three pages long so you should go through them and find some that interest you:

https://www.mangaupdates.com/series.html?category=Childlike+Male+Lead

https://www.mangaupdates.com/series.html?category=Crybaby+Male+Lead

Thank you so much 😀 😀 😀 😀 😀 😀 😀