Most Helpful Girl
I really can't say if he misses you as he seems pretty sure of his decision and seems firm and unapologetic about you two. Since he initiated the breakup if he really missed you he would just simply get back with you. But again it seems like he made his mind, so I don't know if he misses you. I know it is difficult for you but don't make mess of things by trying to make him jealous! Guys don't like that and it rarely works, if anything he pushes him further away. So take that lesson and carry it, never ever do such things to make a guy jealous it might backfire on you. I learned that in a very painful way that I ended up regretting.
He was pretty much straightforward with you. I'm not sure how you can fix what he feels is "too different" and him wanting to be single. Now what you can do is try to maintain a good friendship with him and maybe overtime when he changes his mind (which is no guarantee) you will be there. I know it hurts. It's a fresh breakup, but you will be fine. Continue to maintain a friendship with him which is better than losing him completely.
What you can do on your snap chat is just be natural. Stop doing things for his attention as he will probably notice why you are doing certain things. Since he is watching, every once in a while you can throw out a very subtle hint of how you feel. It should be subtle and not frequent.