This might sound ridiculous but please read this?

So I've been in a relationship with this guy for 4 years and exactly a week ago today he just randomly stopped contacting me in any way

So I finally decided Sunday night I was gonna reach out to him since he wasn't. Well he ignored my text. So last night I call him and text him and still nothing no reply and straight to voicemail. Today it's the samething. So I call him from my house phone and he answers and when he realizes it was me he hangs up. Idk what to do :( sure you can say to move on or to get over it. But it's been for 4 years! He used to live 15 minutes from me but now he lives a hour away and I hardly get to see him now cuz he's always so busy working. I just want answers