Frustration

Ran 14 yesterday. It was supposed to be 16. I had a pace goal. Was supposed to run them with two friends. Had runners with me the first half - then was alone the second half. Except for when I reached the turnaround and a biker turned around about fifty yards in front of me (he had been following me). He kept that space between us but never increased his speed. The path had many curves in it at that point and he disappeared in one of the bends. It gave me a weird feeling. Weird enough so I wished I had pepper spray, or a big dog, or even my cell phone. I ended up cutting my run short by two miles. Ran too slow too. I am disappointed in both my pace and my distance. I need a better plan. I'm feeling frustrated.