I was still very sweet with my Capricorn boyfriend in the morning, and suddenly one day I ignored me. What's wrong with not returning calls or answering messages?

This situation is not necessarily because of you, let alone because of the emotional problems between you, because you are still very sweet in the morning, and he will not treat you so coldly for no reason.

So the only explanation is that he had some trouble today. He is very upset now and will not be able to solve it for a while. If conditions permit, you can go directly to him and see what she has met. If you can help her, help him, which will only make him more grateful and love you.