Advice about brother

Okay, so I desperately need advice about this situation. My brother and I were always close when we were younger (he's three years younger) and the past two years it's been like I don't exist. I moved to a different state and since then he NEVER speaks to me. I'll text him and call him and we won't answer. When I've visited he acts like it's a major problem and he refuses to spend time with me. I don't know what to do, I've reached out and apologized for anything I could've done to make him ignore me but he just ignored that too. Everyone says it's a phase but I just don't know. Has anyone experience anything like this?? Did it ever get better?