Feel like ive lost my identity

Recently ive been feeling like I am no one. Like im just no one. I dont understand this. Im trying to make sense of it logically and it just dosent make sense. Ive started to think maybe im just lazy or a bad kid or something. Nothing feels cool anymore like it did when I was a kid. I dont get excited or feel the wonder of anything wheather its sports, movies, video games, girls. This is like taking away everything that makes life worth living. How do I get these feeliings back? Its like im just a spectator. I cant enjoy the small things in life like little interactions with people that mean anything. It feels like my eyes are just pure white and soul-less. Im unmotivated all the time and focusing on faking being ok rather than trying to fix it. How do you fix it? I dont want my life to waste away and then when im like 50 relize ive missed everything in life because I was too numb experience it.

Does anyone else get a lot of headaches and pressure in their head or tight muscles or tight neck? It feels hard to breath sometimes. Cus I have a LOT of headaches and lightheadedness.