Then to start my response, I'm sorry for misunderstanding your choice of methods in your move. I don't want to offend, I'd like to help and in trying to help I do my best to be forwards and to the point.
While we get older we might get wiser and be more easily to understand what we want, but with age also comes our arrogance in our achievements as our pride gets stronger. If you're going to take your time moving in nearby and carefully approaching them, I think you're taking the right approach.
As a student in challenging fields nearing the completion of my own degree and looking to consolidate my own LDR I understand your pain and frustration at the distance. What you want is possible, I think it's more likely to be stable if you pursue a stable relationship with his primary as well, but there are others here who don't feel that's so important to the stability.