On the basis that I used to watch Fraggle Rock as a child, when there was much less understanding of what Autism was, I don't think that the writers intended it that way.
But- they may have based their characters on different types of personalities that were seen in school children. He may have been based on a kind of shy and quiet child, who at that time would not have been diagnosed (like me). So I think it is possible that he was written with certain characteristics, which we now undertand better and recognise as autistic characteristics. (I like that way that rhymes!)
I also think it's totally awesome that you have a crush on a fraggle, and not one of the obvious ones!
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Your neurodiverse (Aspie) score: 149 of 200
Your neurotypical (non-autistic) score: 73 of 200
You are very likely neurodiverse (Aspie)