Diana and Bruce briefly dated but nothing came of their relationship and the two decided it would be best to remain friends. However, they still care deeply about one another, and this is evidenced by Wonder Woman's love for Batman allowing her to become a member of the Star Sapphire Corps in Blackest Night. Their relationship is echoed in the Justice League Animated Series, where producers decided to pair Diana with Bruce.
After the Commissioner Gordon Batman armor experiment ended (with Gordon doing quite well, really, just not quite the same levels as the main man), Bruce Wayne returned as Batman, wearing a brand-new costume designed by Capullo. The best thing about the costume is that it really looks like the type of outfit that a superhero can move in, which was a marked improvement over the last two outfits. It looks like something an actual person could wear.
In Tim Burton's Batman Returns, Selina (played by Michelle Pfeiffer) seems to be the true love of Bruce's life, as not only their costumed identities but also their disturbed psyches are described as similar. Their relationship becomes intensely dramatic toward the end of the movie, to the point where Bruce actually implores her to abandon her vendetta against Max Shreck and come and live with him in Wayne Manor, to no avail.
In those days it was like, one artist and he had his name over it [the comic strip] — the policy of DC in the comic books was, if you can't write it, obtain other writers, but their names would never appear on the comic book in the finished version. So Bill never asked me for it [the byline] and I never volunteered — I guess my ego at that time. And I felt badly, really, when he [Finger] died.