
There are plenty. You just need to know where to look and to also ignore the Shoujo Ai tag on here. There is no such thing as Shoujo Ai when it comes to Yuri thereby making all Shoujo Ai ,Yuri. This opens up a multitude of other works that have been improperly labeled on this site and others like it.
Shoujo Ai is something to do with Lolicon and nothing at all to do with Yuri which is a "lily" as in "lily love" which means all lesbian relationships, which as marked as "lily love" in japanese culture, are encompassed within the term Yuri. There are other countries with other names like GL or lesbian comics, but here the use of Shoujo Ai is all wrong and leads to a lot of people overlooking the subgenre altogether.
Check out Aoi Hana, Even Now We're Adults (same mangaka as Aoi Hana), Beloved (Dear L), Ohana Holoholo, Hana ni Arashi, Octave, Asagao to Kase-san, Yuunagi Marbled, Eventually I Will Become Yours, or Hanjuku Joshi if you are really looking for something more realistic because a of these are without a doubt very, very human-like and have some of the most realistic relationships that I have read out of all 927 manga I've read in my lifetime. Well, aside from Hanjuku Joshi. It's realistic but also quite innocent in it's own way.
Why cant we have a yuri that's just normal with normal characters