Paul should have way more friends than he does considering he owns a boat (he's also a lovely person). He spends most of his time either chilling in the water, sleeping, or trying to climb trees he then struggles to get back out of. He keeps the local fire brigade very busy.
Paul was always too chilled to be bothered to leave his little area, and joining Kerensa on her adventure was a life changing experience for him. The two are now best friends and are inseparable as Paul is the kind and caring friend Kerensa always wanted, and Kerensa is the sensible friend Paul always needed to keep him from rolling down hills and to teach him how to do the whole existing thing better.