Am I depressed? Whats wrong with me?

I am software developer working on c# . net old application.
I like my job (8 hours of job)
I don't have family, and no friends now, everyone is too far away.
I am always bored, only when not working.
And I try to work to avoid boredom.
I used to go to play snooker to chill, but no friends now so I dont go out mostly.
I do go for long walks sometimes..
It's hard to describe
Lately it's like I am not living at all just surviving.
I had friends in office but got harassed by one female colleague, and out of respect I just stopped hanging out with the whole group cause its toxic.
I live alone.
On weekends I am only completing home chores cleaning and laundry.
I am physically weak so I don't like any sports, i dont enjoy trekking.
Now it feels that I don't like anything, and dont feel anything other then sadness.
by the way I resigned from the job
And going for Master to University of Birmingham.
Am I depressed? Whats wrong with me?
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