Last week a colleague was rude and aggressive towards me which my boss heard but did nothing about. Hr saw me really upset and had a word with said colleague who denied it. My boss didn't address this at all or see if I was ok or ask me what had happened. I feel so upset and let down by my boss as this isn't the first time with this person but it gets ignored. My partner saw how upset I was and phoned my boss at work asking what action would be taken but in a proffessional manner which my boss couldn't answer so I've raised a grievance against both of them. I know they will lie tigether to get out of it and single me out. My boss said he felt threatened by my partner but I listed to the call and he wasn't threaterning. I'm so worried its all I can think about. Any advice / tips?