you could try my favorites, not all of them are 'cute' romance but they are romance that I strongly recommend. Also not all are completed.
http://www.mangago.zone/home/mangalist/50627/?filter=&page=1
http://www.mangago.zone/read-manga/kimi_ni_shika_kikoenai/
It may seem weird at first but ahhhhh.......it's so good and sad.
And idk if this one fits your taste. The character is communicating with her future self instead of her (potential) lover.
http://www.mangago.zone/read-manga/orange_takano_ichigo/

Okay, I'm looking for mangas similar to Angel Time. So communication through time with notes or something like that :0
Doesn't matter if it's yaoi/yuri/shoujo, so long as it has romance nwn/
Thank you in advance!