Sam was two years ahead of him in school, but we could always say they were friendly anyway!
Ana is one of his fellow faculty members at the High School, so she'll be nice to him. She also had an injury that ended her career, so idk but she probably feels a bit sympathetic to him because of that. Being British, I'm sure she teases him about "football."
Jillian is a counselor at the youth center, so I feel like they'd make good friends!
Jack is Jack and likes everyone. We can say they're buds!
I don't know that Avery will have had too many run-ins with him, but she says he's very adorable and has a nice face.