Have been dating this gut for 3 weeks but somehow things happened so fast and we made out the time I visited him at his place. Am kind of worried he may think am being cheap. Though he still communicates and wants us to meet again

Well the physical is there, albeit a little to soon. He still calls, but now you will never know if it was for your body or your mind. Leave the physical alone for now, and see if his interest go beyond your body.

When in doubt, go slower. If he gets impatient, there's your answer.

I agree with the above two replies, however would like to add that if you want to sustain relationships... try to go slow... this way it has long term benefits or else the guy will lose interest fast enough than you'd realize it... they like challenges and if you fall easy... their charm for you may just fade in coupla meetings... and I am sure you don't want that to happen.. right?