Everyone with an application in to INZ ALWAYS feels anxious. You're not alone. But you're doing everything right, from the sound of it. Keep collecting the evidence. And when he arrives, start immediately with the photographs of you together, the joining things (e.g. clubs, library), the signing with a doctor giving the same address where you are, etc. etc.. MAKE snailmail come for each of you, by ordering stuff, and by writing to official bodies (banks, services) so they reply, and keep the envelopes as well as the letters. INZ normally ask for more proof just before the visa is granted, making sure the relationship is still going before they issue the visa, so then you'll be ready.