I too ride alone. Sometimes on country roads, sometimes in the "city" on paved multi use trails. But I don't have many people to call in case of an emergency. I have one person I work with who knows she may get a "I need help" call. But in my cell phone is my emergency contact info programmed as ICE (In Case of Emergency). I read in a magazine the emergency personnel look for this nowadays. I always carry 2 tubes, cell phone, and Id.

Good luck!!!!!!! Hope you can find someone to ride with.