Yep. That ambiguity is what made it special in my opinion. Just saw one towards the end of the tv movies where Perry told her "Let's go home," after a case, as they were leaving the court. That said SO much. You just knew that they had to be at least dating/going out together by then.
Also, a couple of nice quotes from some interviews from the website I linked to earlier:
From a US Magazine article -- 1990 (Raymond Burr)
It must have been a strange feeling working with Barbara Hale again.
It happened that the very first scene we shot was in the courtroom. And we looked at each other and started to laugh, because there is no other way of wiping 25 years off of your life. Suddenly all the terrible things that have happened are gone and you are doing all the lovely things you did long ago.
You and Hale have remained friends through the years, haven't you?
I have been very fortunate. I don't have 25 friends, but the ones I have...
You keep.
Yes. It's just that I'm brilliant about finding people who are patient with me. Don Galloway of Ironside is still one of my closest friends. And Barbara certainly. When we started, if she wasn't married I'm sure we would have been married now. <-- this quote stood out to me. Talk about one heck of a complement, certainly didn't see this one coming at all. Aww, is all I could think in regards to it.
In real life?
In real life. If you have a very close friend as attractive as Barbara Hale you try everything in the world to marry her. But she was very happily married and still is. <-- same here in regards to this one.
From Tv Guide -- 1993 (Barbara Hale)
Burr refused to talk about his illness, even to Hale. "We made a joke out of it," said Hale. "I had broken my hip and had to be in a wheelchair. He told me to come on over to his wheelchair and we'd make it a wheelchair for two." (this one is just made of win, hands down, laughed my butt off at it... just priceless and can kind of see that one ;), so much innuendo...) Hale last saw Burr when she wheeled him, in that chair, to his car on the last day of shooting. "I hugged him and gave him a flower--a wilted rose. I didn't want to be too sentimental." But as she spoke, she broke into tears. "It is possible to have two dear loves in your life. I did. My husband and Raymond Burr. Raymond was one of the funniest, wittiest men I have ever met." <-- felt the same way about this quote. So beautiful and thoughtful.