If you are open to BL this trope can be found easier. One of my favorites is ganbare nakamura-kun, alas it "finished" far too quickly :(. Other than that, and outside of BL, I think Takane no Hana nara Ochitekoi, otomen, or kawaii hito or may be similar to what you are looking for. Though I think titles like Tomo-chan wa onnanoko, mitzutama honey boy, or beauty pop may be a good recommendation as well. (⌒▽⌒)
Heres a list I found that may have others in this trope, though I personally haven't read all of them: http://www.mangago.zone/home/mangalist/394738/?filter=&page=1
I would have to do some mental digging for a large list of more titles so I am currently resigning to giving you lists I've seen with some good titles. Hope thats ok lol.
The first two link are BL lists and the last is a GL list. I saw some good ones in both BL lists but you'll probably have to do a bit of skimming. I am not as well versed in GL but tamen de gushi, magan&danai, or handsome girl and sheltered girl are good! Some BL titles I you'd probably enjoy are the best smell, negative-kun to postitive-kun, and ichi ni no san. Other than that heres some lists that probably include my recommendations & more:
http://www.mangago.zone/home/mangalist/767246/
http://www.mangago.zone/home/mangalist/429483/
http://www.mangago.zone/home/mangalist/192986/?filter=&page=1
http://www.mangago.zone/read-manga/daybreaking_romance/
Hes not as shy and babie ws yeonwoo but he’s still very adorable and is scared to confess to the girl he likes!
http://www.mangago.zone/read-manga/quoth_the_boy/
This one is so precious!!! he looks scary but is a softie at heart
i love this so much does anyone have something that’s like this where they guy is too scared to confess and is kinda shy