That's annoying...

I was talking to this guy and we even started to Snapchat, then recently I noticed he would just open my snaps without replying which is fine. Then all of a sudden I check and we're not friends on there anymore. I guess it just bothers me a bit because things were going so fine? Nothing was off, but I at least wish he would have told me what was wrong if there was something, now I'm just lacking confidence and I'm extremely confused. I just needed somewhere to rant, it's probably stupid to be upset about this but whatever.