Is It Going to Work Out?

Probably not. Most guys pursue when they want something and once they have it, their efforts lessened. Same goes for females as well. Most females 'love' only through a condition. Talk it out. If nothing change, then that's the end. I know it's different with everyone but that's how I see it. After all, it is apparently his first relationship as mentioned so obviously he's unsure how to act after getting into one. You may need to be patient with him and maybe ask why his actions changed. Just saying because he is now comfortable isn't a valid answer. It's a relationship. It's not meant to be entirely comfortable. There's always smooth and rocky moments in a relationship.