Can I get some recommendations about BL that gives sad/touching feelings? I really NEED to cry now lol.
sure! its called Bitten by moonlight with 7 ch. completed
http://www.mangago.zone/read-manga/bitten_by_moonlight/
୨୧ UNREQUITED, TRAGEDY STORIES ୨୧
http://www.mangago.zone/read-manga/bokura_wa_nando_mo_koi_o_suru/
http://www.mangago.zone/read-manga/tamayura_yuki_ringo/
http://www.mangago.zone/read-manga/hana_no_miyako_de/
http://www.mangago.zone/read-manga/tadayoedo_shizumazu_saredo_naki_mo_sezu/
http://www.mangago.zone/read-manga/yume_yume_shinjuu/
http://www.mangago.zone/read-manga/double_mints/
http://www.mangago.zone/read-manga/sakura_gari/
http://www.mangago.zone/read-manga/hana_no_migoro_ni/
http://www.mangago.zone/read-manga/kanashii_kotoba/
http://www.mangago.zone/read-manga/matsugo_no_yume/ (oneshot)
http://www.mangago.zone/read-manga/senya_ichiya_shitone_no_himegoto/
http://www.mangago.zone/read-manga/ouji_to_kotori/
if you do like these recommendations, feel free to follow some of my other lists!
http://www.mangago.zone/home/mangalist/615664/
http://www.mangago.zone/home/people/728364/home/
i hope you have a good day today! (๑・◡・๑)

Is there any bl with zero to minimum height difference?
i'd say Blue Sky Complex had pretty minimal height difference .... the plot is really good too
Most of the ones here tagged both manly: https://www.mangago.zone/home/mangalist/1001835/?filter=&page=5