Can someone identify if this is a Boeing or an Airbus?
There's no need to be an aviation wizard - Easyjet only fly Airbus A319 and A320 aircraft. 

Even if you didn't give the airline, I would guess that it is an A320. Comparing the size of the engine to the person suggests it is a narrow-body aircraft, and 737 engines have a distinctive, flattened lower surface, whereas the A320 series are more cylindrical.