Not advice but sympathy. I actually have to give up on a lot of riding cause I don't have anyone to go with. I just don't think it is safe to go alone. Hypothetically....what if I AM wearing my Road ID, but fall and roll down the side of the shoulder and no one sees me for awhile...scary thought but also a possibility.
I have spent the last year begging, asking, showing up, to rides with people. My teammates are WAY too good for me, so I go with them when we go ONE way OUT and the same WAY back, so the "pick me up" on their way back. I also have other teammates that I train with on their 'easy' days and I ride like heck to keep up. Keep looking, keep looking, keep looking, the best way is to start up conversations with people ON their bikes, if you see each other around enough, you might strike up a riding relationship. I finally have people to go with TWO days a week!