just like i was a week ago! sounds to me like you need a holiday... drop everything and go and spend a week with your parents. a doctors note should cover any deadlines and it'll do you good!
otherwise.. dropping out is an option, your only in second year and youve got a job to go into. if you think it'll give the chance to recover it'll be worth it, and you can always go back to uni.
If you dont want to drop out then maybe do what ive done... convince uni to give you a year off.. to restart second year next year. you need time to cool off, get your head together and have a think about what you really want to do.
obviously if you are suffering from depression then neither making decisions or thinking about what you 'want' are easy.. maybe talk to your doctor and/or personal tutor.. say youre finding it hard to cope, and ask them what they would recommend.
TSR is the perfect place to turn!