My brothers best friend. 🤔🤷🏽‍♀️😩

My oldest brother has a best friend & they’ve known each other & have bern best friends since they were 5. They’re hours apart birthday wise & they used to hang out all the time.

As a family we’re all somewhat close. Like I used to hang out with his sister but she started drama so I don’t talk to her anymore & I’m friends with the best friend & their mom on Facebook cause they’ve known me since day one. I’m the youngest.

For a few months now, me & my oldest brother’s best friend have been having normal casual conversations through messenger & it’s like this huge secret cause we don’t want drama & everyone’s gonna hump to conclusions. My oldest brother hasn’t talked to him in months & we both don’t know why. I asked & got some bullshit answer. But with his best friend, we’ve both said that we think the other person is cute & we both want to hang out & we have flirted like once or twice. He’ll be 27 in a few days & I’m 20.

I just don’t know what to do. Like I don’t know if I’m wrong for doing this & keeping it a secret. He seems very hurt by my brother for not talking to him. & he seems harmless. Idk, what are your thoughts???