I Told My Older Brother's Crush I Liked Him Too...

So my brother has this huge crush on this girl in our class. He talks about her all the time and gets all nervous around me when she comes up. Yesterday, we were hanging out at home and he was going on about how cute she is. So I just blurted out, 'I like him too!'... Of course, I didn't mean it that way, but his face turned red and he freaked out... Did I ruin everything? Should I tell him the truth or let it play out for a bit before saying anything... What should I do? Is this normal to joke about someone's crush? ...