Yes, it is Azusa's thought. Because Karino supported Azusa that day instead of completely breaking him, Azusa realised that Karino likes him and he hoped that Karino would admit that.
Thank you :3 I couldn't believe that Azusa can think something like that and We were discussing what this sentence means with my friend and when I send a screenshot of your reply we realised your user name is Karino and I was like "w-wait a min..the one who replied is..Karino??" then we started laughing hard xd
I was going to post one reply and we were talking about Karino so I typed it in as a subject of reply, but it came out as a username. And when I decided to post another reply it came out automatically so I thought "ok, why not?". And so it stayed :)
I remember the first time I read this I thought it the other way round (Azusa thinking Karino finds it more funnythat way; Karino asking if that's all Azusa has to say; Karino wondering if the other cannot understand his own feelings). Then I tried the other interpretation, but in the end, I never know what to think about this mysterious line. If you look at their mouth, it's extremely complicated to be sure who's talking…it's like both spoken lines belong to Karino (but that's clearly impossible). All of this said I was here again thinking…I want the next chapter. Sigh.
http://www.mangago.zone/read-manga/caste_heaven/bt/262499/Ch3/32/ at this page, I couldn't understand what does "don't you understand your own feelings?" mean. and is it Azusa's thought?