Sexually active

What are someways to get to be more sexually active. My SO asks or tries to have sex all the time and I really have no desire at all.. Like none, 0! 😞 it's frustrating cause I am always denying him. It's probably been 2 months since we have had sex. & I just gave it that time cause I knew it had been awhile. I don't want to have to "give in" cause it's been awhile. I myself want to feel the need as well.