What does it sound like to you? Did our closeness & chemistry make him realize he liked me more than before?

im 19 and in college. we've been texting for about a month. hung out about 3 or 4 times. i spent the night for the first time last night(unplanned), and we had our first kiss(which involved tongue and lip sucking), which was electric. we watched a movie and he was staring at me the whole time. i've been told im a helluva kisser, but after it he was stroking my face, 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?