Ignored?

So I’m in a long distant relationship and my boyfriend and I talk all the time. Or just text. But all day today he has ignored me and left me on read. I’m kind of scared of why and I’ve tried checking on him and he ignores me. What should I do? Or should I just ignore it? I’m just scared he’s losing feelings for me and don’t want that to be the case, but it could be. 😕