What is wrong with me?

I’m a loner and I absolutely love being alone. I love hanging out with my man but honestly that is really it. I usually can get myself to go to social events and take it til I make it but lately I dread it and cannot do it. Tonight really topped it off when I didn’t show up to my long time friend’s college graduation party. Yep. Idk what to do or what is wrong with me. Please help