My brain is completely fucked and I don't know how to repair it.

Ok, so I'm making this post because I need help. I've never been at such a low point in my life and I'm tired of it. I'm also gonna be 100% honest.

First, I'm currently a 23 years old college student who hasn't stepped foot in his fucking university in 3 months. Several reasons to that: I'm lazy, I don't care about my future, I have absolutely zero discipline, I'm addicted to cheap entertainment on the Internet, addicted to comfort, addicted to x websites, addicted to fast food, and most importanty I'm scared of social interactions. Like, some pretty bad social anxiety I don't know how to deal with.

That's my life right now. No need to tell you I don't have any girlfriend or any friends. I spend a great deal of my life completely alone and it's been like this for years, which makes it extremely hard to change. And of course there is everything else. It's like a total shitstorm of problems I don't know how to fix, and it's ruining my life little by little.

There is some positive. The only things I'm doing right these days is waking up early consistently, eating much healthier than before, and regularly going to kickboxing classes. But that's pretty much it. College scares me. Working sounds painful. And interacting with people is alien to me.

What do I do guys? How am I supposed to fix myself? I desesperately want to change but I have no clue where to go from there, it looks dark.