get above yourself
From Longman Dictionary of Contemporary Englishget above yourselfget above yourselfPROUDto think you are better or more important than you really are → aboveExamples from the Corpusget above yourself• Ever since he'd given her that power of attorney she'd been getting above herself.• What was Cambridge, after all, but a small town which had got above itself?• I was thought to be getting above myself because I refused to sight read a scene.