Yes, the conflict in this story is an internal one. Dr. Jekyll transforms himself into Mr. Hyde and is able to indulge in all the bad things he keeps buried inside of him. Soon the lure of this double life gets harder and harder to break. Eventually the two sides of his personality conflict until there is a breaking point. Dr. Jekyll has trouble separating himself from his evil alter-ego and must kill himself to be free of Mr. Hyde. The allusion here is to all of us. Most of us are able to balance our good and bad traits. This guy tried to separate them and it didn’t work too well.