Any BL manga with youthful vibes? Like the type you can chill out to listening to punk pop?
http://www.mangago.zone/read-manga/a_shoulder_to_cry_on/?rnNV
http://www.mangago.zone/read-manga/zettai_bl_ni_naru_sekai_vs_zettai_bl_ni_naritakunai_otoko/
http://www.mangago.zone/read-manga/suki_de_gomen/
http://www.mangago.zone/read-manga/snail_pond_robber/
I strongly recommend first and second, but for first, it depends on the person to feel chill or not cuz the story does travel a bit to the dark side (only a little; every story needs a main issue sooo xD)
Goddamnit, for fuck's sake, at least get to know him a bit better before you say you love him. That felt so rushed.