Ask Anna: How do I deal with a difficult colleague?

In the latest question for our creative advice column, CR agony aunt Anna Higgs offers suggestions for how to cope with a complicated colleague and a less-than-interested boss.

Dear Anna,

I’m doing well in my career but have a colleague who I feel is holding me back by being competitive and uncooperative. I’m not sure my boss is interested in my problems – what can I do to make my work life better?

Anon