Every day for the past four years I go into work early and being large company we have a coffee shop, So I get a large flat white and find a nice lounge and enjoy the peace and quite and enjoy my coffee, A lady I work with started sitting at my table and I was ok with it for a while but now others have started sitting with me and I just want to sit alone, My anxiety starts to build and I feel like sitting at another table but that would be a bit rude, I really want to say something but I don't know how to start that conversation with out offending someone.Any ideas.