I planned to travel alone. Before that, I traveled a lot on my own, so the decision was not unexpected. But this does not mean that I was not afraid. Sometimes, when I walked alone in the park, which is more like a forest, or returned to the hostel through deserted streets in the dark, I thought that if something happened now, then none of my friends would know about it and could help me. Honestly, these thoughts were creepy.
People say that the eyes of fear see danger everywhere, but nevertheless one must be prepared for such situations. First of all, morally, and secondly, physically. Explore the cities and areas to which you travel alone in advance. Be able to have emergency communication and keep in touch with relatives about your approximate location.