Should I just let it go or clear my name when I'm innocent to start?

Something happened with my boyfriend's family and somehow I'm the one getting the blame that it was something I said, when I never said anything because it was none of my business to say anything. My boyfriend is giving me until he gets home from work tomorrow to figure out everything. The truth is, I don't know whats going on and everyone has their own story. I tried to make him understand that but he just wasn't listening. I love him and I have been though a lot of **** with him, and I know he has a lot of trust issues, so knowing that why would I betray him? The situation at hand is nothing of my business to be talking about to anybody, and I never spoke to anybody about it so I really do not understand how I even came about in the situation. I'm friends with everybody in the family, his mom, his brothers and their spouses and his sisters. I never talked to any of them about what I'm being accused of saying. I really want to just let the whole thing go, since he had a really crappy day and is in a **** mood and has been drinking pretty much all day, but he won't let it go until he knows the truth. I feel like the only way to clear my name would be if everyone else said that I had nothing to do with it, but it's almost like nobody wants to make it known that I had nothing to do with what is going on and that I don't even know how I got brought into it because the person who they're saying that said I said something I don't even talk to on a regular basis.

So what do I do? Should I let it go and let everyone else clear my name? Or should I just let him sober up and calm down and let him get his facts straight.

I don't know what to do, I just don't understand how I'm getting the blame when I never said anything.