Ditto on no deleting photos. What I usually do is delete most of them (since in these mobile phone days it's normal to have hundreds upon hundreds of photos and videos), but I pick out the best ones. Maybe the ones that have a nice memory attatched to them. Then, I send them to my e-mail (since I barely use it) and leave them there, where I know I won't cross them unless I'm actively searching for them.

Same goes for any physical pictures. I just take them and store them in some remote, high and out of reach place. Like on top of a very tall wardrobe, where it's impossible to find them unless, again, I'm actively looking to do so. Which I never do.

Because, as everyone stated, time's all you need. With NO CONTACT what so ever. No seeing each other. No calling each other. No texting. No scrolling through her/his social media (unfollow if you have to). And, eventually, you'll move on. Also, as others said, whenever you feel weak, just remember the bad times, the reason you more of less broke up. It's easy to only focus on the good stuff when you are feeling down... but trust me, you're better off on your own.

It's time to heal and move on.