I am not sure how I feel about marriage.
Marriage is considered a cultural union. I believe that this is becoming less and less of a thing. 
Yes I have noticed that trend too.
more people just continue to date long term rather than marriage. its to explore whether they are romantically or sexually compatible. 
I like that idea better than a costly wedding and even more costly divorce.
absolutely, divorce laws vary but you have to deal with alimony and child custody if they had kids. 
Yes and it is very stressful too.
Stress from marriage can lead to bodily harm if there are excessive amounts of it. 
Sounds like the single life is the way to go!
it just has to do with the culture that you were raised in. some cultures want you to marry before pursuing any sexual activity.