Relationships take work and understanding from both parties. The best relationships are when the two people involved accept one another for who they are, not who they think the other should be.
Personal opinions: Why do you think some people like being in a relationship all the time and why do some people prefer hook ups and fun only?
Personally ... I've been in a couple relationships, and they weren't for me. Even as adults, too many women are into the whole "drama" and "playing games" and "I can change him" scene.
Probably an unpopular opinion in this day and age with the younger generation but I personally don't understand this whole " Netflix and chill"/ tinder / easy hook up craze thats going on right now. I believe in having feelings for someone before getting intimate. So as Sin said I guess it's just a matter of comfort level. I'M not COMFORTABLE with hook ups . Rant over :)