Does he care? please help?

i just started dating this guy and he makes me feel amazing all the time hes always complementing me and we cuddle alot and i tease him alot. he can be very physical and flirty its cute and stuff but i feel like he still has feelings for his ex hes always talking about her mostly what she did that he liked im just not sure if he likes me as much as he says im 14 and hes 16 so theres not much of an age difference but sexually there is. we started dating after only 3 days of knowimg eachother. is he only doing this to get in my pants or does he really care