My wife loves seafood, but i dont eat it because im allergic 
Seafood is usually composed of fish and shellfish. Are you allergic to both?
Im allergic to shellfish.  I just dont like fish lol
Molluscs, crustaceans, and echinoderms are all types of shellfish and allergies do seem to be quite common. It's a shame you don't like fish it is usually healthy.