Dissociation during something I’ve waited so long for

So I just went to see my favourite artist live for the first time. I’ve waited years for this day and I’d get so emotional just thinking about it, but when I was there it was like I felt no emotion and completely dissociated.
Not to be parasocial but every piece of work they’ve done has been my hyper fixation for as long as I can remember and it’s made me feel really sad that I felt nothing during the moment?
I’m not sure if it’s because I made my self so overly excited or because or overwhelm or something else
I’m having a hard time explaining what I mean by this so I’m just hoping someone has related and gets what I’m putting down lol