If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
I don't think that's enough information for me to return a single specific piece of advice. What does Alice think Bob would think of her getting married in his absence were he to be brought back at a later date? How likely does she think it is that he'd be brought back in her lifetime? Does she think that she'd still want to be in a relationship with him if she waited and he was brought back after, say, forty years? Etc.
There are certainly trends in relationship behavior which can constitute actionable information, but I think the solution to any specific relationship problem is likely to be idiosyncratic.
What does Alice think Bob would think of her getting married in his absence were he to be brought back at a later date?
Bob also was monogamous. Alice is pretty sure Bob wouldn't like it.
How likely does she think it is that he'd be brought back in her lifetime?
Alice is uncertain. She thinks it's possible, she is not sure how likely it is.
Does she think that she'd still want to be in a relationship with him if she waited and he was brought back after, say, forty years?
She has no idea what she'll want in 40 years.
...the solution to any specific rel