TRENTON - Gas prices rose in New Jersey and around the country due to increased demand, but analysts expect that to slacken in some places as the end of the year approaches.AAA Mid-Atlantic says the average price of a gallon of regular gas in New Jersey on Friday was $2.19, up a penny from last week.The national average price for a gallon of regular gasoline was $2.13, up two cents from the previous week.Despite a potential increase in demand over the holiday season, analysts expect demand to weaken as the year's end nears amid new restrictions in some states due to the rise in COVID-19 cases.___For the latest local news, sports and weather, download the FOX 29 News app.AdvertisementDOWNLOAD: FOX 29 NEWS APPSign up for emails from FOX 29,.