You are never too old for Shoujo!
However, I find it hard to give you a recommendation because of the last part of your request.
One that I can think of the top of my head is http://www.mangago.zone/read-manga/karekano/
However, be warned that the drama of this one is pretty heavy. If you are looking for fluff, I suggest that you skip this one. But if you are okay with drama, this is one of the best shoujo out there.
But if what you are looking for is fluff and cute stuff, then I recommend http://www.mangago.zone/read-manga/love_so_life/
This one also has a continuation http://www.mangago.zone/read-manga/life_so_happy/
I think all these manga are worth giving a shot:
http://www.mangago.zone/home/mangalist/259455/

So i used to love shoujo.. I am now 20 though and i guess maybe i am too old for it? idk..
Do you guys know any shoujoes with not too overly flowerly cutesy artstyle that almost makes me gag and where the MC and the male lead goes farther then holding hands and one tiny kiss at the end of the manga?