What does this mean on a iPhone 5?

I called my boyfriend twice today and it rings for a couple seconds then it goes to voicemail. Did he block me cuz when I use to call him it rang for a couple of times and it went to voicemail or he picked up. I heard that if it goes to voicemail quickly then he blocked you but I don't think I did anything wrong

He either ignored the call or his phone is dead

He didn't block you he pressed end when you called

He might just have his phone completely turned off.