There are a select few people of the groups I'm aware of that I've seen ride like idiots a *lot*. I don't like to ride with idiots.
They're they ones who rev the crap out of their bikes, make lots of noise, cut people off, etc. That's not my thing.
Whereabout are you wanting to ride? I don't get out and ride a bunch in the winter, but you're always welcome to come along.
Feeling safe riding solo will come with miles. You just have to put them on. There was a time when riding the 30 miles from my house to Moore seemed too far. Now, I've ridden to Alaska, Key West, NYC, and everything in between and I look forward to being able to hit the open road!
Just be patient and go at YOUR pace, and you'll be fine. That's the important thing. Don't try to keep up with whoever you're riding with. Ride your pace. They *should* wait for you or not run off and leave you anyway.