Help

My boyfriend won't talk to me. It's been 19 days since I last saw him or spoke to him. He won't open my Facebook messages or answer my calls. The only time he has replied was when I needed to get some of my things from his apartment and he wanted to know what I was taking or when I had something for him. I don't know what to do. I love him and I'm scared to end things but it feels like it's already over.