conceited

Don't grow conceited over your successes.

They hated that conceited, self-satisfied creature.

He became conceited after only modest success.

I’m not as conceited as so many people seem to think.

Many people become conceited after only modest success.

he's so conceited he'd never believe anyone would refuse him.

Promoted too quickly, the conceited young man became overbearing.

She was so self-conceited that she was averse to all advice from others.

He's so conceited that when she refused his invitation, it really put his nose out of joint.