Why can't I be normal about the things I like

I recently got back into My Chemical Romance and I can't be fucking normal about it. I obsessed so much about Gerard Way and his voice and his looks and the tour lore.

So much that I instantly cry whenever I see Gerard or listen to their music, which happens a lot in my feed. I get so anxious and my heart about to explode. I start spiralling into negative thoughts and compulsions.

Why can't I be normal about the things I like? I hyperfixate in things until I don't anymore but when that happens I can't even function like a normal person.