Whenever I meet someone new, it seems like the thoughts of "will it last" are foremost.
And there is the "this could be the one" mentality.
If it's going great right now, then maybe that is enough said.
Depends on the manner of relationship.
Generally, no. Duration isn't a gauge of a good relationship.
Ask any person who suffered long in an abusive one because they felt trapped for decades.
You can just tell when you meet a couple who are truly devoted to each other.
It doesn't necessarily have to be time, but that's a good indicator. I'm thinking about the relationship of Paul Newman and Joanne Woodward. You don't see many relationships like that.
Another measure is when one half of a long term couple dies. If the couple have been very close it's not uncommon for the remaining one to die shortly after. Usually a week or two.
I lost my wife of 27 years in Sept 2017 to cancer,so far I'm OK, occasional waves of sadness and grief strike,not as often,lessening with time,all the photos and momento's packed away in storage.......