She thinks I lied and stole?

Okay, well sorry if there's typos, I'm typing this really fast because I feel horrible right now. I was looking at my friend's crayola juice , andd I was gonna drink some in band class , and I was holding the cap and one of my friends that didn't own the juice was holding the bottle, and my teacher came over and took it, because we can't drink in that class apparently. But I thought it was just that we couldn't eat in that class. and that friend said I was gonna have to get it back for her because it was my fault I got it taken away, so this kid stole it off of my teacher's podium and then gave it back to the friend it belonged to, but before that I took all the blame for that friend and said it was my juice and stuff and I had asked if I could have it back politely twice and she said "No, you can't.". and she thought I stole it when she dfound out it was gone, and literally tried to blame it on me, and I said "I didn't, you can even search me!!" and she looked like she wanted to but she didn't, but I didn't have it anyways. and my friend put it in the trash to make it seem like someone took it and threw it away, and my teacher was all like "either you took it or one of your friends did." she doesn't trust me at all , but the thing is , she really doesn't have a reason to not trust me... ): ugh . its seems like every time I try to do good for someone , or take the blame, it never works out and I always end up getting in trouble. Do you guys think I am guilty, I was just trying to be a good friend, and please help me stop feeling guilty. I am hoping she will see the juice in the trash and NOT think I put it there, I didn't. and I really value the teacher's respect and am saddened that she wouldn't even believe me. So please help me feel better, because today hasn't been a good day for me, and this made it worse.