No sex newlyweds

My husband and I are TTC, but it seems like we only have sex whenever I'm ovulating. I want more, though I'll admit, my husband has gained 60+ lbs in the 19 months we've been married and I'm not very visually turned on by him anymore. I still love him tremendously, but just don't look forward to having sex with him like I used to. We always have sex with the lights off now. Any advice for how to spark our love life? I feel like, as 20-something newly weds, we should be having great, hot, steamy sex... and often!