Does anyone ever feel this way?

Aimee
I have been with my amazing boyfriend for over a year now. We both love each other so much and are in our early 20s. I can't imagine my life without him. We are silly together, completely honest with one another, and just love spending time together. 
We don't joke about marriage. We talk about it like its a real and tangible thing that we ARE going to do. 
But the question is when? If we ever talk about this (which we frequently do) he just tells me to be patient. I want to be his wife very badly though as soon as possible and go through life with him by my side. I think about it so much I'm starting to feel like a crazy lovesick puppy. Does anyone feel this way? Or should I just cool it?