I get too invested in shows and fictional characters

For instance: and this is still sort of happening now, I was very invested in Spike from Degrassi High. I mean the old 80s one, not the fucking next generation. But I had a major crush on her, due in part because she looked punk and I like punk, and I would run scenario upon scenario of me interacting with her within the show. Sometimes I wished I could time travel back to the late 80s/early 90s and meet the IRL actress, and then get miserable about how unrealistic and pathetic that sounds. Scenarios in the show like her being kicked out over being pregnant generally angered me and I personally 'retconned' it so that there was a massive outcry and the school board had to reinstate her because it angered me so much. Keep in mind, I've never ever publicly expressed my investment in fictional characters, or ranted and raved about say Spike, because I know for a fact this isn't normal.

On a side note, I can never actually hold an interest long-term like a normal person. My interest in a particular thing runs for probably like a month or two before dying out, and when they die out, my brain just does this thing where it actively rejects what I was once into, like looking at it, or the people starring in it, begins to actually annoy me. And I hate that. I like a damn piece of media, why can't I continue to fucking like it for a long time? I literally envy people who hold life-long interests in shows and movies.