@sun860123,
I think it's too late.
48hrs I assume you are / were with him. Weekends at his age is about going out with the boys "as well" or doing something that he likes to do, as well. 48hrs during a time slot that has so many possibilities tied into sitting on the couch, tv, eating, etc makes him feel married, very tied down.
He has told you, he's not the one for you, it's one sided. He has told you that he can't handle 48hrs in the only time he has off from school/work. Now that you have gone back to compromise, he doesn't know what to say to you, he has a heart and cares, so he opted for "ok 1 more week".
He wants his space, regardless of how he may feel about you, he's not ready for any relationship.
Old saying " If you love someone, set them free, if they come back to you, they're yours if they don't they never were".