Can anyone recommend me some good poly yaoi? Where all three are in a relationship and no...

have you read

https://www.mangago.me/read-manga/triangle_lovers/

https://www.mangago.me/read-manga/i_wanna_die_before_i_m_30/

https://www.mangago.me/read-manga/there_s_no_way_this_is_fate/

?? or just find some here
https://www.mangago.me/tag/poly

https://www.mangago.me/read-manga/ai_o_ataeru_kemonotachi/

https://www.mangago.me/read-manga/yarisugi_party_night/

https://www.mangago.me/read-manga/paripi_party_people/

https://www.mangago.me/read-manga/bachi_bachi_kijima_hyougo/

https://www.mangago.me/read-manga/canis/ (the speaker)

The Changed: the beta count

Jealousy (cheongu)

Stepping into troble

Stepping into trouble

Twin brothers

The twins and me.
Bro you will die in this one

Man Falls For One Personality While the Other Personality is Attracted to Him

https://www.mangago.me/read-manga/pufferfish_and_dolphins/
This one - horror. So read it. Why will I be the only one to literally feel disgust, sad? You will be my partner -in-crime

Tachi to Neko Docchi ga Ii no?