I feel stuck.

My job is a toxic place for me right now....it has triggered my depression, and it has caused me to start SIing way more than I used to. Not only have things been bad, but the only person that I trust and can talk to at work got a new job and has put in her 3 week notice. I am happy for her as she isn't happy with her current job and will be making more money at her new job, but at the same time I am scared. I can't trust or talk to anyone else, for reasons I am not going to get into (very long story). The only person I feel comfortable talking to is leaving. For a while, I was actively looking and applying for jobs, but I can't do it anymore. I have stopped caring and have NO motivation or energy. I know I can't stay at my current job, but at the same time, I am extremely nervous at the thought of starting a new job while in this depressed state. My current job is making me depressed, so much so that I am unable to look for or even think about getting another job. I feel stuck.