I go to the cinema by myself all the time. I do so much stuff by myself - I'm single and it's hard to get friends schedules to overlap most of the time so **** waiting and just go. I go to restaurants by myself, holidays, theme parks, you name it. I've had people say that it's sad as well but what's even more sad is just waiting around doing nothing because you're too scared to do something by yourself (obviously not everyone, especially the parents with younger kids).