Finding a group of people who want to ride at the same pace can be difficult. Riding by yourself has its pros and cons--you can pace yourself and really pay attention to what you're doing and that can be a great learning experience, but you may not be motivated to ride as long or far as you do when you have some company. You might want to ask around about different bike clubs. In my area we have clubs that are for beginners, slowpokes, social riding, and those in training. There are easy 5 mile trail rides and serious 100 hilly rides and everything in between. It may be that while you develop your skills and strength you don't ride with family and friends, but with a group that can help you feel that cycling is FUN. To look for a group, ask at bike shops, bike associations, and search online. Try meetup.com. I'm sure you'll meet new friends who have had similar experiences and need YOU to help them out.
Becky
"To get something you never had, you have to do something you never did."