My life is so flat

I have plenty of friends, I do stuff every week, I play guitar for hours a day, I go on walks, I play video games, watch YouTube, etc but it all feels boring and flat.

I dont even feel depressed anymore I just feel nothing. I dont feel upset at all or irritated or anything else,I just feel nothing. Like im stuck in a constant state of 5-6/10 nonstop no matter what.

The only thing that ever changes that is weed but I dont smoke often and I dont want around having being high the only thing I look forward to. Does anyone have any advice. Idrk what to do.