What do I do?

So my boyfriend has been blatantly ignoring me for the past week. I text him a "good morning" every day and he has pretty much always responded in the tree years we've been together but he hasnt done that at all latley. I will also text him throughout the day with "hey, hows your day going?" Or other stuff like that and he wont respond at all. He sees my text but doesnt respond. Hell I've even dropped hints on my instagrahm story about it. I understand he may be busy but he always tells me when hes going to not be able to respond. Maybe im just flustered or aggrieved because I miss him but im worried. It's a long distance relationship (I'm in New York and he's in Texas) and I cant help but feeling sometimes that its not enough and hes going to leave me or start seeing someone else without telling me. Maybe I'm just being paranoid, after all it's only been a week, but I dont know what to do...