how can i cum when he eats me out?

ive been veryyyyyy turned on since me and m bf started having sex. hes the first actual bf ive slept w more then once. other than thst ive only had one past partner..he ate me out about 3xs now and the first time i didnt really feel anything just a tad bit pleasure and had been thrusting tho..but the second time he stopped and fingered me really fast and kepet eating me out..he has the technique of using his tongue and only concentrating on my p***y but not my clit is that why im not feeling too much pleasure? any techqnices i can use so i can cum all over his mouth?