Any help/advice welcome. I've recently gone back to work having been off sick for 7 weeks. New colleague joined 6 weeks prior to my sick leave, I provided training and we got on fine, general chit chat etc but since my return they have been 'off' with me, verging on rude and excluding me. AIBU to be a bit upset by this behaviour as I'm worrying about the effect it will have long-term. I realise I'm at work to work, but feel lonely as we are a small team.