The guy was hurt, that's for sure, and upon reading the texts I think he probably had something for you. He's actually fairly straightforward, especially with "well i do but i don't really believe you," that means that he wants to trust you and possibly make something of your friendship and what not but you damaged that and he's not sure. And he acknowledged missing you. He's being reticent, but fair, because he's trying to protect himself.
As far as his updating you with his agenda, I think he's trying to be conversational....it's like a way of opening up. I don't think it's a heavily symbolic thing like "I'm coming back Sunday and I want you immediately." He is testing the water, which is a good sign. Thankfully for your case I think you're dealing with a guy who is nicer than most.
You're coming off slightly stronger than you need to, what with all of the "I miss you"'s. And "fuck everyone else its just you and me" is an uninhibited statement that someone might say if they're drunk - bad news because in light of the unstable and extreme behavior he knows your capable of under the influence, he's more likely to distrust any sort of strong statements on your part. Stable behavior will be more likely to earn the trust of your buddy back. It sounds like you have strong feelings for the guy but you need to control yourself a bit more. Or are you sure you know what you want out of this whole ordeal?