Most Helpful Guy
Serious equates to being an adult, and most guys (and girls) your age don't want to be "adults" yet.
Sure they want to drink, and go to bars and clubs and act like they are to be taken serious, but when it comes to real life, they aren't interested.
I was frustrated about this concept when I was 19 too, because all the girls that were around me talked about wanting a serious guy, but never put it into practice.
Instead they went for "bros" and it was pointless to even engage in a conversation with them.
Eventually you will find the serious guy, but you will need experience to be able to separate him from the crowd, and I don't mean dating experience necessarily.0