I'm sorry that you are feeling this way. I've been there, looking at my phone debating whether I should send a simple text, like throwing a fishing line into the lake. But it's the fear of loneliness that has made me do that. In the past, my gut has told me that the person isn't right but my heart longed for companionship and fear of getting older and being alone (I'm 34), especially when you're surrounded by nothing but couples, advertising, etc.
If he already took down the pictures, he may have done so out of anger or because he's begun the process of getting over the relationship.

I say cry your eyes out, watch movies, eat snacks, veg, whatever you need to to grieve. Then throw a life line to a friend. You should focus on yourself and figure out why you broke up, was it you, was it him, what can you learn? Have an emotional growth spurt. Work on yourself, if you feel like you made a bad decision and he was 100% the right guy, you could follow up months in the future. If you dont feel that way 2 months from now, you'll know he wasn't for you.

The last time I contacted an ex, he gave me another chance and said he missed me and he made a mistake, blah blah. We gave it another go, only to find out he preferred cocaine than me. I had no idea he even did that, I ended up 2x hurt and fell into depression.

Now, what I did next probably wasn't smart but I did, I downloaded Okcupid and found myself a date. It made me feel better, knowing that there was life beyond my ex and I ended up dating the kindest person and made me realize that I made a mistake going back to the ex and to try to work things out when he clearly had issues. Suffice it to say that it didn't work out with kind guy b/c he's an alpha type and I didn't like that, but I learned more about myself and I handled .. well am handling this break up better.

In conclusion, try your best to distract yourself, exercise get fit and feel healthy, build confidence, make yourself better than you were before you were with this ex and when you're ready go on a date with someone new and see how it goes.