Need something new

You can try "Boku wa kimi no tori ni naritai"

I've already read it :(

http://www.mangago.me/read-manga/suki_ni_naccha_ikenai_hito/mf/v01/c001/4/ (in love with sister's fiance)
http://www.mangago.me/read-manga/kawaii_hito_pure/ (in love with sister's ex-husband)
http://www.mangago.me/read-manga/ani_no_senaka/ (in love with sister's husband)
http://www.mangago.me/read-manga/sumanai_masumi_kun/ (in love with wife's father)
http://www.mangago.me/read-manga/follow/tr/123637/page/12/ (in love with sister's husband)
http://www.mangago.me/read-manga/love_skit/ (in love with sister's husband)

NON-YAOI--->
http://www.mangago.me/read-manga/tsuyogari_fujiwara_kiyo/ (in love with sister's ex)
http://www.mangago.me/read-manga/37_c_no_boyfriend/mf/v01/c001/pg-6/ (in love with friend's boyfriend)
http://www.mangago.me/read-manga/hikitateyaku_no_koi/an/hikitateyaku-no-koi-chapter-2.html/1/ (in love with sister's boyfriend)
http://www.mangago.me/read-manga/lovesick/ (in love with stepfather)
http://www.mangago.me/read-manga/kono_koi_wo_wasurenai/mf/v01/c003/3/ (in love with sister's boyfriend)
http://www.mangago.me/read-manga/takane_to_hana/ (in love with sister's fiance....sorta)

Oh...And I missed 1 yaoi in the previous comment - http://www.mangago.me/read-manga/totally_captivated/ (in love with ex's boyfriend)

Also the first story of "Last Portrait" ( http://www.mangago.me/read-manga/last_portrait/ ). Hope you haven't read it already :)

Thank you so muchh I like your two lists (⌒▽⌒)

I have x) but thank's

oh :( well, if I remember any other similar manga I'll let you know!

oww okkkk :) ty

You're welcome :)