No interest in many things

I've been dealing with some lack of interest in many things lately. These include hobbies (I used to love to play piano, guitar), drawing, motivation to lose weight, and urge to socialize. I haven't had friends for so long that the thought of even trying to make any is dreadful. This has caused me to hate everyone around me. I get little bursts of energy to play guitar or draw but then it dies again.

I feel like I'm going in circles. I lost my Mom in September last year and it was a terrible time for me. I know nobody cares but just thought I would write this anyway