this. seriously, you are not happy just because of this? Your boss didn't exactly say you were playing politics either, maybe you are just thinking too much. Maybe she just decided to say that on the 5th day of work instead of the first day in case she was afraid she would scare you off, and it just coincided with the small talk you had with your colleagues.

Hey, at least your new colleagues are willing to have lunch with you. Do you know some new people who joined a company can't even get to have lunch with the old colleagues whom have been there for a long time because they already formed their own clique long ago?

Some people have lunch alone for 2-3 years plus, face all the stuff you listed above and even more ****..

Why did you even leave your old job in the first place ?