Hey :D
First of all, don’t give up. There was a point in my life where I felt what you are describing. I didn’t see the purpose in life. I couldn’t get a girlfriend. I couldn’t succeed in anything. I felt alone. However, I got by. I think it might help you if you try some of the things I suggest. Well, try finding some type of hobby or game that you have never played before. It can be anything. Sports or video games. I chose an online game that I had never played before. I would spend all of my time on it when I was home. On top of that, during the day, I would explore the city I live in for anything that appealed to me. I lived day by day. I woke up in the morning not knowing what the day had in store for me. It’s funny because, you find out a lot about yourself when you are lost. Find yourself :)
It took me awhile to get out of this period, but I did it. I began coaching a YMCA volleyball team. And, I joined my police department’s cadet program :) Just find things that appeal to you! I hope I helped! let me know how everything goes.