Also something to take into account, we are all susceptible to peer pressure. If all of your friends are married/have children/buying houses/single, whatever it is, we can feel we are doing something 'wrong' because we aren't where they are. Inside, we are all still really the same little kids who look to see what others are doing.
What's also confusing is, in the past, most people WOULD be doing the same thing. They'd be married and have kids and because everyone did the same, there would be a comfort to that. My 80 year old neighbour told me she never worried or stressed or wondered what else was out there, as her life was normal as everyone elses was, and there is comfort and purpose in that.
What's confusing about modern life is there are so many opportunities, which is great, but it can be confusing.
Should I get married, and to who?
Do I want children, if so when?
Where do I want to live?
What career do I want?
The rule book has been ripped up and we don't quite know what to do instead.
Finding like-minded people and slowly understanding what makes you happy is really all the purpose you need. You are young - it's okay to be confused and lost. This is the time to go exploring.