Exeter Uk need an exercise buddy

Hi all. Not sure if this will work but worth a try. I am 53 years old and looking for a fitness buddy to keep motivated. I need to be accountable for doing regular exercise. Think it would help if I had someone to exercise with so it’s more sociable. Really need to work on tummy area! Any suggestions or ideas welcome. Definitely need to increase resistance training as I am pretty good with cardio.