Why Did I Tell My Brother About My Crush?

So here's my story. I'm the middle sibling out of three kids, and my life has been a constant struggle to stay out of the spotlight that surrounds my older brother and younger sister. Both of them are super popular at school and get all the attention from our parents for their achievements and social lives. Meanwhile, I've always felt like the quiet one in the background who no one really notices. But last week, something happened that made me feel terrible about myself. My best friend since kindergarten, let's call her Sarah, moved away to a different state. She wasn't my romantic crush or anything intense like that - we just had this friendship where we'd share secrets and jokes for years without anyone else knowing about it. But she was the only person outside of my family who really got me. When Sarah told me she was moving, I was devastated and cried myself to sleep that night. The next day at breakfast, my brother, Jack, kept asking if everything was okay because he noticed I looked upset. He's always been a bit nosy like that, but also kind of annoyingly protective sometimes. So instead of telling him the truth about Sarah moving away and how sad I am, I made up this ridiculous story about having a crush on our English teacher, Mr. Thompson, to explain why I was acting weird. I know it was stupid - he's old enough to be my dad for crying out loud! But in that moment, telling Jack something embarrassing felt like the easiest way to shut him up and change the subject. The thing is, ever since then, every time I see our parents or Jack around Mr. Thompson they joke about how I have a crush on him - even though it was just a lie. And now everyone thinks I'm some kind of creepy stalker who's into teachers. Meanwhile, nobody has any idea why I'm actually upset over my best friend leaving. So here's what I want to know: Was telling Jack about the fake crush the biggest mistake ever? Should I have just been honest and told him that Sarah moved away instead? What can I do now to fix this lie and maybe get some real support from my family again? I'm so tired of feeling like the odd one out and getting these jokes about Mr. Thompson. Help me figure out if there's any way to turn things around.