i cant horny and my boyfriend is mad!!

Okay ladies i need your help! whenever my man and i hang out he always wants to touch me and do sexual things but i am just not interested or horny and i know that's frustrating for him and i don't mean to be a burden or anything like that but idk what to do!! has anyone gone through anything similar and have any advice?? i dont want this to jeopardize our relationship so i need help and fast!