Responses
Not exactly but has similar vibes to the one only on the first chapter. Thank you for reminding me of it! I like that manga and I don't have to ask here about it later.
I remember they made a specific conversation about what the boy was doing, and the boy said he liked the friend, which was a lie. And that at some chapters(?) later the boy confessed the truth to the guy that he's the one he liked, not the friend. Also, the guy has no prior knowledge of the boy other than seeing (or feeling?) him when he was peeking at them.
If there's none... Perhaps I might've misremember that manga and it was actually this. (^～^;)ゞ
It's in a school setting, guy spends eating in certain spot with his guy friend. Then, the guy noticed that there was someone, a boy, stalking/watching the two (this is vague but I think he thought this particular person was looking or aiming at his friend). When the friend was gone for some time (or day?), he made this person come out or he approached to ask about why he was watching them and asked if he liked his friend. The boy said yes. So the guy like made the boy eat with them so the boy could spend some time with the boy's "crush." But, it turns out, the boy actually likes the guy not the friend.
It might be more vague than the previous one, since it's been a while when I read it. (^～^;)ゞ