Justin Bieber and Selena Gomez are in a pretty good place in their relationship. When Bieber celebrated his 24th birthday last week, Gomez took to social media to send him a sweet greeting.

On Instagram (@selenagomez), the "Fetish" singer posted a photo of herself laughing on her back with a polaroid photo of Bieber attached to her head. "March 1, 1994 someone I know that happens to be super cool was born. Boom," she captioned it.

Given the fact that the two rarely post public displays of affection on social media, Gomez's greeting is a good sign that their rekindled relationship is going strong.

A lot of people have even commented that the two lovebirds have grown up significantly since their first romance. "Justin and Selena are still going strong. Everything is so different this time around," an insider told E! News. "This time around, Justin is behaving like a gentlemen and showing how much he cares about her. He's is a lot more open about his feelings towards Selena, which has been a big sign of him maturing."

Their busy schedules might keep them apart during most days, so they keep tabs with one another using technology.

"They've both been busy traveling but they do a good job keeping in touch when they are away from each other. Selena and Justin text all day and even FaceTime from time to time," a second source shared. "They are still together and speak all the time when they are not together."

It also helps that the two are sharing a deep passion for Jesus Christ. Bieber and Gomez are regularly spotted attending Hillsong church services together, and they are also close friends with Pastor Carl Lentz and a lot of evangelical figures.