It is only a few weeks, its a time when you should see each other infrequently and speak when you arrange a date. Not be in constant contact or fretting, and not having to ask "whats up" when you don't speak for a few days when one of you is busy.
However, as is the case mostly in these days of instant everything, fast food, and constant babble you have had sex. Women seem to want instant relationships, men seem to want instant sex. These things are not compatible with each other.
On another thread here, a woman is tying herself in knots over whether to accept an expensive gift from a man she barely knows. Apparently we should all earn, be independent, and see red flags when men are generous or chase us, and yet when a man doesn't text, we should wait with docility for him to chase us. So we should be 
docile and independent. Again not compatible. Quite frankly if she wants a man to chase and woo her, and later to pay the bills she should graciously accept. If she wants equality with a man she should politely decline and go for a beer with him.
So, are you confused ? what should you do? do what is right for you, if you want total equality with a man just send a quick text asking whats up. If you want a man to court you and chase you, don't. In short, be authentic and true to yourself, do not second guess anyone's intentions, just act in accordance with your own.
However, what is the point of overthinking it all, he can't even remember your name, why do you think he can remember when he last saw you?