Sorry this is long and for any spelling errors

So me and this guy dated for 4 months and my mom said he was completely in love with me. We didn’t see each other much even tho we lived like 30 minutes away from each other. When we broke up it was because I didn’t want to be in a relationship at that time or I didn’t feel like putting any effort in, I was in a weird place with myself. He seemed so sad in the last text he asked me what he did wrong in the relationship and I told him nothing because he did nothing wrong.

He didn’t text me back obviously. I felt like I hurt him a lot. Me and my cousin still have him on our snapchats and like 3 weeks ago we were on my cousins Snapchat and we took a picture and let her little sister send it to whoever she wanted to and she sent the pictures to my ex. I was so worried to see his reaction because you never know what it could be or if he would even respond, but he did and he sent a picture back smiling with the caption “what’s up” and so my cousin told him what happened and he laughed.

All I’ve wanted for the like the past 2 and 1/2 months is for him to text me and to have a conversation with him (we broke up 6 months ago.) I think about him all the time but it’s not like even if he wanted to have a relationship again I moved 600 miles away. I don’t know what to do.

What would I even say?