first and foremost, life is long and you have time. second, you most certainly are not alone as there are many, many peeps feeling exactly as you are. technology has an isolating effect in terms of irl relationships. the porn addiction is a symptom of this and when it all just becomes meat, it makes it harder to have actual physical intimacy with another human being. third, as others have said, you are suffering from depression and then nothing feels good, that's what is known as anhedonia.
admitting something is wrong is an important first step. talking to someone and seeking treatment would be helpful if you are finding it hard to figure out on your own. the last two cents i have is slow your roll, your being and breathe. don't dismiss the little things, the small rituals and def get outside.
Seriously, they are one of the most tiresome posters. The look i'm so logically smart type, and complain about lemmy but hang out on lemmy.