I completely understand.
I deleted just about all of my social media accounts about 4 years ago due to the over-sexualization of LITERALLY everything. And I also see your point about going out in public. As someone who is currently trying to quit a PMO addiction, it's rather frustrating having to actively force myself to keep my eyes forward and avoid giving that kind of media any attention, but I want you to remember something.
What's important is not "did I look?", but rather "did I let it control me?" I've adopted the "No-Peek Rule", which is essentially putting a timer on how long you allow these things to catch your attention. For me, I've been trying to set my timer for 3 seconds or less. With today's culture, it would be impossible to completely cut these things out of your life entirely, unless you're willing to lock yourself in a room with no outside connection to the rest of the world for the rest of your life.
Yes, it can be frustrating, but rather than forcing yourself not to notice anything ever, try this: Simply acknowledge it, tell yourself you won't let it control you, tell yourself it is unworthy of your attention and move on. I'm also in a relationship, so if I'm out with her, I'll turn to her, give a smile, a peck or anything that pulls my attention away. After all, would you rather take the real deal or a picture of someone you'll probably never meet?
Hope this helps brother.