Yes, safety is a concern in certain locations, and it's often pleasant to have someone to share the scenery with. But never underestimate the glory of traveling solo, because you'll learn things you can't learn any other way.
If you have the heart of an explorer, traveling alone is an excellent way to see the world on your own terms. But it can also be scary, particularly if you're a woman concerned about her safety on a solo trip to far-flung corners of the globe. Self-reliance was at the core of your being.