I am bi does he like me?

ok so there is htis boy and we hung multiple times and i kno he likes girls,i asked him if he would ever try doing anything from the bak and he said hes tried it to a girl but she didnt let him, this was over text and he texts me all the time, also wen we weere sleepin i felt his knee on my bakside, idk i dnt want him to tell him im bi cuz he might not wanna be friends anymore what can i hint or maybe joke around to see if he wants to be more then FRIENDS?? please help asap