I think it's really important to have working relationships that don't cause stress. That doesn't mean you have to get on like a house on fire with anyone/everyone but it also means not having angst. It sounds like this is a bit angsty.

So I guess the choice is - can I keep going to work and just accept that things are never going to be the way they were and I'm always going to feel on the outer? How will I feel about that?

Or, you could look for another job.

Depends whether you can accept your current circumstances or not.