u/MINXG

I recently started a new job and I'm getting a weird feeling from my colleagues. When I first started they invited me to lunch and it was kinda a given we would sit together. Now that I've been there for about 8 weeks I find myself feeling excluded. We had lunch today and I selected a larger table we normally sit at only for all of them to sit together at a completely different table.....including my manager.
I'm normally not someone who cares about making friends at work but due to this being a much smaller office space and even smaller group of people, I can't help but feel quite isolated. I get the feeling it will look bad if I in response to the exclusion start eating elsewhere. Does anyone have any advice for this situation?