I'm male bodied, but trans identified, so not exactly a "normal guy," still I enjoy receiving (and giving) oral sex. My female partner has never liked giving head, it will happen occasionally but she just doesn't find it pleasurable for her.
And that isn't a problem (and we've been together over 10 years, and married for almost 3).
If you don't like giving oral you shouldn't feel obligated to do it. Find other things that please you and your husband and go with those. When he does get oral it'll be a special treat.
If a lack of oral sex is causing your relationship to "slip" you may want to reevaluate whats going on with it in general.