Jack Russell Terriers

Im a owner of a three year old jack. Ive had him since he was 3 months he is one of the greatest dogs i have ever had, after moving to a new apartment i have noticed he has become aggressive around his food bowl area but its only with me though and he wags his tail at the same time, i have never had this problem even when the bowl is empty he growls if i even go near it. Im confused on what to do help is def needed!!!