I really don't remember much about this movie because I saw it about 12-13 years ago when I was a kid sitting in a bar with my father who was drinking beer.
- This is a Hollywood movie (pretty sure) and is some kind of alien, mutant or vampire movie.
- The actress is herself an alien/mutant or I think she becomes one.
- The actor is in love with her.
- In the end she is put in a cell or a room where she is burnt alive. And the actor who was sad because her love was going to be killed goes into that room so that he can die with her. And they start kissing each other with flames rising and the movie ends.
That's it. I have been struggling to find it for years.