Is Dating/marriage Really Worth It?

I just had a talk with this girl that's not exactly my girlfriend, but we both really like each other. She asked if I've ever had a girlfriend, and I said no. She asked why, and I sort of told her why. I have many reasons, but I don't want to list them all here. But the ultimate thing is that I really don't know why. It's really confusing. I can't really explain it...what I told her is stuff like I don't need one and stuff. Of course, that was probably the worst thing I could possibly say to a girl that I like. I kind of want one when I really go deep in my heart, but I don't really see any need for one. And I...well I can't really explain it to where you can understand because I don't really understand. I don't want a girlfriend or a wife just for the sake of having a girlfriend or a wife. But I do want her--as an individual. That's the simplest way I can put it. That's the part I do understand. I don't want A girlfriend. I want THE girlfriend.