I write short stories from time to time and the last one I wrote came out intuitively as inner monologue of a single character. I never published my short stories and I believe that this one is of great quality (three professors affirmed it) and I want to try to submit it to some magazines thereof The Atlantic, Threepenny Review, The Sun etc. Yet I don't know if I should keept it that way or change the base of it, include a second character and transform some of the long inner monologue passages into an exchange of the two characters?

PS: I'm aware of the fact that some authors have already done it before, such as Luis Borges' whose short stories were somewhat thoughtful and philosophical... Daniel Orozco's short story as well of Orientation etc.