exs friend

Alright i need help, so for the past month i had been broken up with my boyfriend, yet we continued to do stuff all the time but that month we had been planning on getting back together but the whole time he was being extremely rude to me and he would be so distant even after we would have sex. I cried so much for the past month bc all i ever wanted was him to be my boyfriend again. So i slowly started giving up then all of a sudden he wants me to be his girlfriend again. I told him how i felt and that i was beyond confused on where we were at and that i wasn't happy at all. He still is being flirting but i'm the one being distant this time but it's not purposely. I just don't want to fake my feelings you know? But recently i've been talking to his friend (not in a flirting way) and we want to hang out but we don't want to be rude towards my ex. So i'm not sure what we should do. I feel bad and all but it's my life and i feel like i'm allowed to do what i want but i don't want him to get super butt hurt.