What kind of symptom is this?

Sometimes, if not most of the time I get really (and I mean really, REALLY, super) interested in something - for example a TV show, I would get so obsessed with it that it becomes too much to even think of, sometimes to the point of thinking about it makes me nervous.

And even something as mundane as writing/typing/saying the title of the show feels...I don’t know how to describe it - just, too much. Too much as in I feel restless, nervous, too excited.

I don’t know what’s going on with me. I’ve felt this way for so long. Could it be a symptom of an underlying mental condition?