I have dated a lot.  It is hard to find a guy nowadays who actually wants to commit.  So many have experienced heartbreak and fear moving forward.  It is much easier for them to keep their options open and stay casual.  The biggest complaint I’ve heard from guys in the dating world is that the females become needy and often expect too much too soon.  You are already talking about a future when you should be more focused in the friendship aspect … getting to know him and see if he is right for you.  The best advice I’ve heard to keep myself from expecting too much too soon is to focus on enjoying each moment you spend together, with no expectations of the future.  This kind of relaxed interaction is refreshing to guys, as so few females seem to exhibit it nowadays.  Future-thinking can cause anxiety on both sides and is one of the biggest reasons for guys to feel pressured and bail.  Another reason for guys to back-off is being emotionally unavailable … which may be apparent in this case, as he readily admits he’s still thinking of someone else, so not really available to you at this time.