How do i get him to ask the question?

ok so me nd my friend bryun hv known each other since out july of last yr.. we hvne treally been able to hang out bc of me goin to skool nd him wrkin on music nd everythng .. nd since im not allowed to date or go to guys houses its even harder.. but he recently started comin wit his brother to pick me up after skool on friends.. i go to his house.. my mom thnks im at a friends which ik is wrong but i really lik him.. we act lik wer datin.. he calls me boo nd everythng lik tht.. he always says im beautiful nd he knows tht ive been hurt alot by guys ..so he says he wnts us ot keep tlkin nd beenin able to hang out more b4 we date.. which i guess is good but he knows how badly i wnan date him .. but its lik wer datin without the offical title.. we hv nd everythng.. i jst wnt him to ask me.. so ny help?