Help!! How to get him in the mood more often.

My husband and I have been together for 12 years. We've been TTC for the past 2 years with no luck. Our sex life has slowed down quite a bit lately to the point where we are only having sex on ovulation days. My sex drive is significantly higher and would like to make it a more frequent occurrence. Any tips on getting him in the mood more often? Maybe switching it up a little bit. Although, sex with him is great when it happens,  it's always the exact same routine. HELP!!!!