Getting too intimate too soon can overwhelm a budding relationship.
This is true whether the intimacy is physical or emotional in nature.
Are you trying really hard not to ruffle his “commitment feathers” by asking him how he feels about you?
Are you, instead, trying your best to show him what a great catch you are by being the sweet, fun-time, easy-breezy gal on the outside (even if you are crumbling with worry and insecurity on this inside)?
Even if a man is really into you, he will pull back just to see how you´ll react.