The 24-year-old singer is still in love with the brunette beauty and despite recently attending a concert with Baskin Champion, he's still only interested in one girl.
The insider explained: "He isn't dating. He thinks and talks about Selena all the time. The chapter with her is definitely not finished."
Although Justin is determined to rekindle his romance with Selena, pals of the American star reportedly consider him to be a "bad influence" on her.
A source previously shared: "There's a big crew of people [in Selena's circle] who really don't like Justin and they especially don't like him with Selena.
"A lot of her friends really don't like him. They think he's bad news for Selena and don't approve of the relationship. They think he's a bad influence on her and she becomes really dependent on him.
"She's so generous and loyal and puts 100 percent of herself into everything, including her relationships, which isn't always the healthiest."
The Canadian star has made an effort to develop a better relationship with Selena's friends and family - but they're still not convinced he's a suitable boyfriend.
The source added: "Justin does care what her friends and family think and has tried to win them over, but some of them are just over it.
They're there for Selena and support her no matter what, but don't feel like they need to welcome back Justin."
