Traveling solo is a good experience. You will get to know yourself more and also improve yourself. You will know what you can and can not do, what risk to take and not to take. You will make mistakes and also learn from them. You will learn to be more responsible for your decisions and actions. It will definitely broaden your perpective in life and traveling...
Once a year, I travel with my brother and /or sister. We are all incompatible and have different travel style. But we still enjoyed our travels.
I also travel with my boyfriend-now-husband. The experience is different and sweeter.