Among reasons that people do not want to travel alone is that they are afraid that they will be lonely.
However, as an introvert hovering between being an ISFP and INFP, “loneliness” isn’t something that I’m afraid of while on the road. In fact, I do my very best to stay away from people which doesn’t make me a very sociable person.
Despite my lack of thought about being lonely while on the road, there were some occasions when I did feel lonely during my trip last year. Oddly, in those situations I wasn’t alone but the sense of loneliness was there.