Facing issues with a particular NCO who continuously has taken upon himself to undermine me in everything I do and say?

He has been constantly keeping tabs on me and portrayed me as someone who doesn't do anything and basically only been on details and 'chilling' infront of my peers and other NCOs. He is new to our squad/unit and has only known me as a soldier for a few months out of which time either I was away on another mission and he was on EL. For him to have formed such a perceived notion about me and influencing my peers to have the same outlook about my performance is highly unfair and demoralizing to me as a soldier. He has recently taken over as our SL and seems to keep on finding faults in me while it other soldiers with similar issues are overlooked. I feel I am being targeted as I am quiet by nature and donot tend to become confrontational unlike some soldiers.However I would not be saying if his behavior wasn't getting to me, I have started to become mentally stressed and donot look forward to going to work, basically lacking motivation towards my job. I fear this could get worse if I don't do anything in regards to the situation. What options to I have here?