I Battle Depression

Today and the past couple wks have been terrible. Im so depressed about my job; i work with a bully and she kisses the bosses ass constantly its sickening; she shows one face to people above her and then bullies other people she feels she can bully. I don't know how to deal with her toxic energy except to avoid her as much as possible.
I have been working for this company for almost a year and was at two other buildings before this one. I get depressed before work now and i never did before.
Everything's so vague and im paranoid and depressed.
This woman has the queen bee syndrome and i feel like she's out to get me. I feel like everyone's out to get me.