Am i falling for him too fast?

im 19 and in college. we have been talking on the phone for about a month. we've hung out about 3 or 4 times. i spent the night for the first time last night, and we had our first kiss(which involved tongue and lip sucking), which was electric. its like we have such great chemistry. we watched a movie and he was staring at me the whole time. i mean i've been told im a helluva kisser, but after the kiss he started stroking my face, and as i was falling asleep he would kiss my forehead, and he turned on music and was singing to me. he didnt pressure me for at all. after last night i'm deeply infatuated, is it too fast? do you think it was just the kiss the made him act this way? or did our closeness and chemistry make him realize he liked me more than he thought