What to do with life

Well I am 18 years old , just lost the dream that had always been with me for ages , well I had a lot of self doubt which resulted in not acting on my dreams , leading to wrong decisions

I am also an overthinker, I tend to analyse things, and emotions very highly that makes me very sensitive, well to be honest I don't even remember any happy memories from my life , I have even forgotten to smile , it's an irony that I can understand other's emotions like an open book but my own emotions are messed up and very complicated, the only thing that made me feel happy even for once in my life was that dream

Now i have no reason left to smile , i can't even understand my own emotions and also i don't even know if I am depressed or not .

I have a great metacognitive ability , so most of the times I am just observing my own thinking and reactions . This makes me unable to enjoy anything, I am not interested in anything in this life

What to do