Mauthecat, please seek the help of a professional if you're struggling with any thoughts about 'giving up' - because what you're feeling right now might soon change - in another month's time you could be looking back and saying 'thank god I didn't do anything rash'. I know this because my mum has a friend who suffers from depression, and my mum actually quoted her saying that she was glad that she didn't make any rash decisions when she was at her lowest.
Of course, if you're simply saying that you're leaving the forum, then I'll just leave you with a 'it's been nice having you on here. And good luck'.