Selena Gomez had a tumultuous relationship with Justin Bieber since they started dating in 2010. The former couple had a quick reunion in October 2017 after the singer-actress broke-up with The Weeknd. However, they split again in March 2018, and the "Baby" singer reunited with model Hailey Baldwin, who he also dated before. Recently, onlookers told TMZ that the 24-year-old Canada native proposed to her new girlfriend at a resort restaurant in the Bahamas. This news reportedly raised Gomez' brows, according to a report from Hollywood Life.

Selena Gomez thinks Justin Bieber is only trying to make her jealous

According to an unknown source close to Selena Gomez, the singer-actress was totally stunned that Bieber and Baldwin got engaged that quickly.

It is alleged that she can't believe that her ex-boyfriend already proposed to his new girlfriend, and she thinks that he is just making her jealous.

“She honestly can’t believe it. Selena didn’t think they were even that serious, so the thought of them getting married is just mind-boggling to her,” the insider told Hollywood Life.

On the other hand, Bieber's parents, Pattie and Jeremy, tweeted and shared a photo on Instagram on Sunday, which seemed to confirm the engagement.

Selena Gomez also thinks that her ex-boyfriend might be ready for commitment

Apart from thinking that Bieber might be only making her jealous, the source also said that Selena Gomez is also wondering if her former beau wants to prove her that he is now a more mature person and ready to commit.

The insider went on to say that Gomez can’t stop thinking about it. Additionally, she is now wondering if he really loved her throughout the years they spent together.

Selena Gomez has uncertainties over Justin's love for her

The source added that if Bieber is indeed serious about marrying Baldwin, Selena Gomez is questioning her former flame's feelings for her when they were still together, especially that the engagement took place only a few months after they broke-up in March. According to the insider, the actress doubts what's going on right now because it wasn't too long ago when Justin Bieber expressed his endless love for her and swore that he can't live without her [VIDEO].

Is Selena Gomez's mother the reason for their break-up?

It can be recalled that the singer-actress' mother, Mandy Cornett didn't like the idea that Selena Gomez and Justin Bieber were back in each other's arms, which could be the reason why the Canadian singer didn't pursue her. According to a separate insider who told Hollywood Life, Bieber doesn't want to deal with this issue for the rest of his life.