Cant find logical reasoning

My bf has expressed recently we don’t have sex b/c he doesn’t want to get bored with me as if i can’t get bored with him which i have it’s never nothing different. i don’t know how he finds that logical we’ve had sex maybe 20 times out of the 2 years and all the rest is me giving him a bj but I’m not going to be doing that anymore but am i making sex a large part of the relationship