Boy problems🙄

So I was talking to this guy my brother knows and who’s really good friends with him and all. We have been talking for a while and he’s been really cute and flirty but just like yesterday and today he’s been totally ghosting me. Leaving me on read or not answering. Not saying I’m stalking but I can see he’s on Snapchat and I just have no idea what came across his mind for as why he’s not wanting to talk literally at all anymore. If anyone’s went through this please comment.