I read Blue Sky Complex and I want something similar to it.
There was scene [url]http://www.mangago.me/read-manga/blue_sky_complex/mh/sa-c003/pg-33/[/url] on page 33 and 34 where the one, who got kissed don't get like freaked out or don't blush for what the other one did. And cause of that, the other one who did that gets like courage from that.

And I liked that. I want to read something similar to it.

I don't know if I understood what you want, but you could try...
Dousaibou Seibutsu
Hoshi yo Oka yo Fuyu no Ao yo
Furueru Yoru no Himitsugoto
Slow Starter (ICHIKAWA Kei) (same mangaka as BSC)
Terebi-kun no Kimochi
Sannin Gurashi
Junketsu Drop
Rin!
Mizu no Haru
Bokurani Matsuwaru etc.

I suggest Seven Days.

It doesn't have any scene exactly like the one you described but it's one of those shonen-ai romances where love is dealt with in a very "grown-up" mature way, somehow. It's cute too.

It's the Art of Time, it's the Art of Life--
Of the player and the craftsman,
Of the writer of songs, of the creator of love,
Of those who will follow, of those who led,
There's no other way in the world ahead ♥