Searching for yaoi manga, story goes like this, cute couple seme is a pastry chef , they get engaged but seme falls down the stairs and loses his memory of uke. Uke is devastated and stays away from seme but keeps seme's ring as a chain. Seme meets uke again and falls in love but seme gets jealous because uke pushes him away and seme sees the chain wuth the engagement ring and later remembers everything.
is it this one? http://www.mangago.me/read-manga/kowagaranai_de_soba_ni_ite/
Holysht I couldn't help it and stayed up till 4 am to read the novel and onfg the tears that rolled down my eyes every chapter after this latest part dear Annette you're amazing