Finding people to run with can be a patchwork project, but always worth the effort. Most local running clubs have group runs where you can find people of roughly your current level of fitness. From there you can get to know which ones you mesh with and whose life details could facilitate frequent runs together. (Do they live reasonably near you? Work roughly the same schedule? And so on.)
A great way to meet new running partners is talking with people who finish near you at races. After you give each other the obligatory “nice job” handshake, ask if they want to join you on your cool-down. Could be that the person lives five miles from you and is dying to find others to run with.