Try changing your dynamic. The human brain thrives on novelty.
Play genres you normally wouldn't -- e.g: Hate horror games? Good - try out Silent Hill or some classics you skipped over.
Get a VR headset, go from 2D screen to proper full body 3D - fly a plane over the Andes, feel like you're actually flying. Pilot a huge mech. Build a colony on Mars with your own two hands.
Burnout happens and it's worth examining other areas in your life, but gaming's always been the wondrous thing it always has.