Can someone recommend me a bl where the seme is afraid to lose the uke, then he became pos...

I have the perfect manga for that but the roles are reversed (uke is afraid to lose seme) but I wouldn’t really call it ‘fluffy’..

http://www.mangago.zone/read-manga/akuma_chan_wa_momoiro/

http://www.mangago.zone/read-manga/whatever_the_start_may_be/