A lot of good advice here (therapy, etc.) but one thing you might consider is just getting part-time job such as a cashier, barista, whatever. Something where you have somewhere to go and can put your mind to a task for a while but the job doesn't follow you home after so you can pursue other things more relevant to the work you eventually want to get. I think you'd be surprised how just having something to do can make you feel. It helps as well to have a daily routine that you execute ( and having a job can help with this) without much thought but without fail to keep some momentum up instead of just sitting around with your thoughts day in and day out.