Ok

there is a novel where a girl reincarnated as the heroin and chase after the villainess and it's more of a shoujo-ai

Bakarina?? Have you read this manga? It’s cute and funny, no interest in the male leads and tons of girly friendship with the heroine

It's not available on mangago is it?! I wanted to read it

http://www.mangago.zone/read-manga/otome_game_no_hametsu_flag_shika_nai_akuyaku_reijou_ni_tensei_shite_shimatta/

Here you go- http://www.mangago.zone/read-manga/endo_and_kobayashi_s_live_commentary_on_the_villainess/

http://www.mangago.zone/read-manga/it_seems_like_i_got_reincarnated_into_the_world_of_a_yandere_otome_game/

http://www.mangago.zone/read-manga/i_swear_i_won_t_bother_you_again/

http://www.mangago.zone/read-manga/otome_game_no_hametsu_flag_shika_nai_akuyaku_reijou_ni_tensei_shite_shimatta/

The second story- http://www.mangago.zone/read-manga/though_i_may_be_a_villainess_i_ll_show_you_i_can_obtain_happiness/

This one is fixing up to be like that (in my opinion at least)- http://www.mangago.zone/read-manga/the_evil_lady_s_hero/

And this one's kinda like that. It's the villainess that really wants to remain friends with the heroine (to enjoy the show) and the heroine just doesn't really care what's happening (including with her love interests)- http://www.mangago.zone/read-manga/miss_not_so_sidekick/

That puts me in mind of this series-
http://www.mangago.zone/read-manga/mage_demon_queen/