these are my favorite stories too! unfortunately I don't have a list, though :(
«✜[]✜» Rival/Enemi fall in love
http://www.mangago.me/read-manga/anata_no_tame_nara_doko_made_mo/
http://www.mangago.me/read-manga/junketsu_drop/
http://www.mangago.me/read-manga/devil_x_devil/
http://www.mangago.me/read-manga/omerta_kochou_no_yume_no_kate/
http://www.mangago.me/read-manga/like_as_the_time_will_come_when_it_will_rain/ - 1st
http://www.mangago.me/read-manga/you_re_my_loveprize_in_viewfinder/
http://www.mangago.me/read-manga/shinjuku_lucky_hole/
http://www.mangago.me/read-manga/kobi_no_kyoujin/
http://www.mangago.me/read-manga/detective_conan_dj_aonoao/
http://www.mangago.me/read-manga/missing_code/
http://www.mangago.me/read-manga/nights/ Ch.1&5.5
http://www.mangago.me/read-manga/blue_nathanael/
http://www.mangago.me/read-manga/eiyuu_to_shounen/
http://www.mangago.me/read-manga/lock_out/
http://www.mangago.me/read-manga/mugen_garan/
http://www.mangago.me/read-manga/punch_up/
http://www.mangago.me/read-manga/50_x_50/
so far this is how much i have ^o^
http://www.mangago.me/home/mangalist/49096/
Is there a list already created where it's just about rivals that falls in love with each other?
I like reading those kind of yaoi stories