Stuck...

My husband and I have been ttc for a year and a half after having a miscarriage. In that time a lot of our friends have gotten pregnant and had babies. My husband is getting very discouraged and at this point I'm stuck as to what to do. I don't want to push him to keep trying and continue tto get negative results which is causing us to have problems but at the same time I don't just want to stop trying. Our insurance doesn't cover fertility testing and that frustrates him to no end. I'm at a stalemate as to what direction to take at this point and this whole situation is driving us apart. He is pulling away and I feel like there is nothing I can do to alleviate the situation. Its hard enough trying to stay positive for myself and I feel like the more I try to stay positive for the both of us the more exhausted I become...