When did you started talking about moving in together with your SO?

Lately I've been thinking on it. My boyfriend lives 35 minutes away from me, he has a car and he's looking for a job. I'm one year and half to finish college and I'm thinking that maybe when I finish college I can propose to him that we should move together. It's just more convenient because once he finds a job and I do it too it'll be harder for us to see each other. So I'm curious. When did you started talking about moving together with your SO? And in what circumstances?