Im looking for a yaoi manga, it was an attack on titan omegavers. Eren was the alpha and L...

http://www.mangago.zone/read-manga/shingeki_no_kyojin_dj_fan_service_omegaverse/
this one maybe?

wait- i realized i got their second genders switched...it's probably not that one. i'll keep a lookout though!

this one?
http://www.mangago.zone/read-manga/shingeki_no_kyojin_dj_mihitsu_no_koi_ni_yoru_ai/

I forgot the title but try to search Eren x Levi on the search icon or tag.

There are so many doujinshis about Eren x Levi, you'll find it for sure ヾ(❀╹◡╹)ﾉ~

Yes, thankyou