It's a long story but basically I've been working at a place on short term contracts for three years, they just said they will renew it another year but after that want to get someone else in.
I've had a lot of issues in this role recently as the person I report to has been bullying me and other people, and publicly undermining me. This has been verified by colleagues who are full time employed in the team, who have offered support around this.
During my summer holiday I realised I don't want to carry on in this role any more but I don't want to burn bridges and I know they will be angry that I'm leaving as they just extended the contract and they don't want to recruit at the moment.
I've a few things to finish up so I would like to leave between mid October and mid December, but probably sooner rather than later.
What's the best way to say it without making the person I report to angry? I'd like to get a reference from them in future so I need to leave on good terms.