I travel and ride solo all the time, like I have said before if I waited for others I would never go anywhere.I am even doing 6 weeks in japan solo starting in january.
The trick is you have to be content with yourself, lots of people can only be happy if they are with other people which will stop them from doing hundreds of things in their lifetime, especially as they get older. If you are one of these people you will get homesick and probably end up crying for you mother in the middle of the night. The internet can keep you connected to others if you really cant stand it.
Travelling solo is also a great way to meet new people and try things you wouldnt normally, I highly recommend it and if you can handle it you open up your life to a whole new range of possibilities.