Need urgent advice .. weed

My boyfriend and I have been dating for 5 months now and are so happy together. I'm in love with him. but lately he has been wanting me to smoke weed with him. I don't enjoy it and hate the feeling it gives me but he gets really upset when I don't and always ends up with us arguing ... I hate seeing him upset or angry. what do I do or say? I don't want to smoke but he sacrifices so much for me