I met my husband through another online cycling forum. Local forum members had gotten together a time or two to socialize, but I'd never been able to join them. Brian and I talked about meeting on our own. Perhaps there was a bit of agenda to that on both our parts, but it was really intended more platonically.
He is a number of years younger than me, and frankly, I just didn't seriously consider him a possibility. But we did ultimately meet (our first meeting was postponed due to an epic flood in Central Indiana). We became friends and it eventually morphed into a relationship. I had a lot of misgivings based on our age difference, but in some ways that worked in our favor because it kept me from getting overly ga-ga(and slightly nutty) like I so often had in the past. We took it slowly, but once the fundamentals were there, it sort of took off rather quickly. We met in June of 2008 and married in February of 2010.
I was about your age when I met Brian, so I feel for where you are. The best thing I can suggest is to just do what makes you happy. Hopefully, those things will allow you to meet others who then see you at your most vibrant. There are a lot of male cyclists so that's not a bad way to go. I was never big on fix-ups, but if you have friends whose judgment you trust, it's not a bad route to pursue. I don't have anything against internet dating either; you just have to use good judgment and safe practices.