Boyfriend Just Disappeared?!

Me and my boyfriend of 2 years talk pretty frequently. Usually he texts me every few hours, or gives me a phone call. We don't live together yet, I'm 18 and he is 20. I live with my parents he lives about 15 minutes away in an apartment. Last night he told me he would call me at 10, he didn't call or text. I assumed maybe he fell asleep. He will usually call me around 8 or 9 before going into work, but no phone call or text. I sent a few more texts asking if he's okay and I've gotten dead nothing. His phone still rings when I call, but he doesn't pick up. I'm really worried...what should I do? I can't leave to see if he's home, but it's not like him to do this.