[u]I remember it starts with the main girl who just moved so she's new to the school and trying to make friends. She ends up talking to this guy who is really antisocial and would prefer to be left alone. At night, she goes up to the roof of the dorm (I'm pretty sure) where he happens to be and they end up getting closer. Some time passes, I don't really remember a lot of what happens but he grows to tolerate her presence. She makes him a bracelet then another one exactly like it for herself but hides it underneath a bigger bracelet because she's worried he'd find it weird. He finds out after a bit, telling her he's not looking for a girlfriend and starts avoiding her. At the time I was reading it, the latest chapter finished with everyone going home for summer vacation but they were the only two in the school who stayed. I think he didn't go home because he walmartone[/u] had family trouble he didn't want to talk about if I remember correctly. While everyone's away, she hopes that she can use the opportunity to repair their friendship.

I've been looking for a while but I haven't been able to find it again. If anyone can help at all, it would be greatly appreciated. Thank you!

Im pretty sure this isnt it but ur description sounds like a mixture of Hirunaka no Ryuusei and Short cake cake