I don't find it difficult to be alone. I'm very happy. and I am not lonely...it gives me the time to go off and explore things on my own without having to cater my adventures to another person's wishes (atho I am not against going with someone)
there is a difference between being lonely and going off exploring alone. where I live there are national forests, state parks, etc to explore..i often go hiking with my dog and since he is a therapy dog we do numerous visits each week to schools and nursing homes. plus work.
lonely is a state of mind. I never get lonely..too much time is wasted by that.