I once went to the cinema on my own; many years ago. Felt like a fish out of water, like an 'island' with the 'sea of life' swirling around me. Everyone was paired up, like Noah's Ark.
The film was loud, engaging, of course it was dark, and it wasn't bad sitting there 'on my own', but I never felt like going alone again.
Years later I found it wasn't the same feeling going into a cafe on my own, and began to look forwards to it.
I still wouldn't go to a cinema on my own though, maybe the matinee; less people go then.
Everyone and every place is a bit different; I'd say give it a try, you might like it