Is my boss flirting with me - he keeps touching me/nudging me we we talk?

He always touches my arm or shoulder.
He leans in very close to me when we talk and nudges me.
He winks at me.
He also never used to do this up until around a few months ago and I’ve worked with him for 2.5 years.
Is my boss flirting with me - he keeps touching me/nudging me we we talk?
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