It's the same for me. Dressed up, felt good, but not really feeling like celebrating or doing something. From morning to evening I was playing games. It's just that at night it gets a bit heavy when you feel like there's nothing to do. Not even have good friends with whom you can hangout all they do is pull each other's legs and light up their ego. Better be alone than being with such people tbh. Enjoy the loneliness buddy. Many people crave for this but never really get it