Regularly snoring on a long term basis is, as mentioned above, an indicator of sleep apnoea. This can be a very serious medical condition. The snoring is a sign that his airway is obstructed, thus there is not as much oxygen getting to his brain - and the rest of his body - as there should be. Wikipedia and all the medical websites will tell you about the side effects of sleep apnoea.
Mine went undiagnosed for approximately 10-15 years. I started treatment with a CPAP machine in March 2013, and it has changed my life. I couldn't be trusted to drive even 10 minutes before. Even as a passenger, I'd be nodding off mere minutes into a journey.
The results of my night at the sleep clinic showed that My breathing was being interrupted on average 32 times a minute. Is it any wonder I was always exhausted?!?!
You really need to sort out this childish response of your husband's and inform him about sleep apnoea. It's not just people who are overweight that suffer with this although they are the majority.
Would a print out of information about sleep apnoea be a starting point. Although you shouldn't have to, make this about his health rather than your quality of sleep and tell him how concerned you are if he doesn't get this investigated.
Now, I just need to do the same with mine. He doesn't sulk, he just knows that his Dr will tell him that he'll stop snoring if he loses weight, so he keeps putting it off. Thanks DH!!