Pointlessness

[24 m usa] I feel like life is very pointless. Although I have a good job, and family that care, I feel that my life is meaningless. I don't enjoy anything. I was very depressed before, because my gf of 3 years broke up with me. I don't feel as depressed anymore, but I feel a severe lack of joy and positive emotion in life. After my gf left, I pretty much neglected all my friends, so now I don't really have any friends I can talk to. It really damaged my mind.

I don't enjoy things anymore. I used to play soccer and tennis because I loved them. Now, all I do is go to work, go on the internet, and play video games. God everything in life just seems so pointless. I don't know that I can articulate my feelings very well, which doesn't help. What should I do?