Is he not interested?

So my bf of 2 years is constantly looking qt pics of other woman I've explained him hiding it is really what bugs me and that lately he hasnt had much of a sex drive for me . Well last night I was helping him with a problem on his phone and clearing off cookies ect. Well in his deleted pictures were alot of a certain girl that were more dating photos than spank bank . I've voiced this make me feel like im not what he wants but he swears hes not talking to anyone else and im who he wants to be with .

Im just kinda lost of what to do or what to ask for to try and fix this problem or should I just walk away ? Please help