Just wondering

How long does one wait for marriage? How important is marriage to most people? I’ve been dating someone for 1yr 1/2 now and I feel like I am ready to give it my all and be with her and no one else. We’ve known one another since we were 14-15, we are closely approaching 25. We’ve always bumped heads and were stubborn with one another but we have matured so much and have broken so many walls down from each other while building so much between us. Recently marriage has been on my mind so strong. I’m not sure if she has taken me seriously when talking to her about it or not. I don’t want to rush or push her away but I’m not sure how to feel. I’ve never wanted to completely settle down with someone and give them my all.