As with any relationship sex involved or not. You need to keep things alive, and interesting. you've been together for 2 years. Your both at a comfort level that passionate effection isn't expected, at this point and from here out you and he both have to put for effort to be passionate with eachother. get creative, experiment with new things. you can do alot of playing around with out having actual intercorse. try playing with toys, and such if this is something you've never tried with him before blow his mind and do it. A good sex life is very important to and realtionship, and by sex life i mean sexual contact and experiances with one another.
all in all just have fun, laugh and enjoy eachother in bed.