Don't over think anything
Girls tend to do everything on a polar side: Either he must be absolutely in to you and he's trying to play it cool; or he isn't interested in you at all and you must be very silly to not see it.
It's totally possible he was in to you at the time. It's possible he's still in to you. It's possible he was just out having fun. It's possible he has no intentions of ever texting you. It's possible he's preparing to propose to you. (Maybe not practical... but possible..!)
I think what's important is you just take whatever it is as it comes in relationships. If he's interested, that's great. But if he's not? That's perfectly fine too! I think people so often try to over analyze relationships, that they spend too much energy trying to see connections in other people where they may not be - resulting in bad relationships, instead of relaxing and enjoying the ride and embracing the connection if and when it naturally happens (= good relationship!)
But that's just my two-cents