There is a lot of bad press about travelling alone. You hear of murders on Thai beaches, tourists falling into the wrong crowd and being attacked, even people disappearing… But is it really all that dangerous to travel alone? Of course, it can be. You need to be very, very careful. It can also be one of the most amazing things you will ever do, though.
If you are thinking about travelling on your own, do it. Be careful about destinations. For example, somewhere in South East Asia would generally be considered to be safer than going to Nicaragua alone. That being said, unless there are specific travel advisories in place for a destination, there will usually be many destinations you can visit perfectly safely. Buddy up with other tourists, don’t do anything silly like going out alone at night in an unlit area, and go and have the time of your life.