Trouble in paradise

Im not happy in my (newly discoved narcissist) relationship and spoke up about it..hes making a effort but i feel like its too late and that its all a lie to keep me with him. Its been 6 years. The same thing on a cycle but i just relized the pattern...i cant enjoy sex with him and his smell..it almost offends me now...advice on narcissist ,is it possible to truley be happy with them?