Why is my boyfriend being rude with me?

I (22f) was texting my boyfriend (20m) and then all of a sudden his mood changed. I don’t know what happened but he completely changed, i asked what happened and he said “lazy to explain”. i asked him again what happened and why he didn’t want to tell me, and then he started to ignore my calls and texts. When he decided to reply, he said “shut up, you’re so annoying” then again proceeded to ignore my texts and calls. I have no idea what’s going on and it seems he has no plans on telling me or at least talk to me. Nothing at ALL happened previously, we were perfectly fine. I just don’t understand why he’s being like this all of a sudden. What does this means?

Why is my boyfriend being rude with me?
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