Completely paranoid!

I've gone from being fine last week to completely depressed, suicidal thoughts and awful awful paranoia!
I feel like I'm completely cut off from my friends even though I know I could call them and see them anytime. I feel like I would bring an atmosphere or they'll be others there that don't like me or maybe they don't really like me either. I feel like my boyfriend will get fed up with me if I keep feeling unwell. I'm over analysing everything everyone says and does. I snapped at work the other day and feel awful. I'm totally exhausted from it. I can't understand why people are near me if they hate me. I keep trying to tell myself no one does but I can't stop thinking it. what should I do?

Thank you for your reply, I will try it. I know the answers to some of my questions and I am ashamed of them. I struggle with shame and I guess I assume everyone hates me as much as I hate myself sometimes. I'm going back to therapy in the new year to try and conquer it. I hate feeling like this!