Max George "gives up sex" after Michelle Keegan split
A friend told The Sun newspaper: "Max is serious about behaving himself - in real life and on his phone.
"He's been telling friends he wants to persuade Michelle to take him back and is dedicated to not having relations with any other women.
"It's not going to be easy while the band are on tour. They are constantly surrounded by women they're meeting for the first time but Max is committed to the challenge."
Max and Michelle's long-term romance came to a bitter end after he was snapped kissing another girl in a club.
His ex, Bobbi Aney, then added insult to injury when she claimed he'd been sending her sexy text messages while he was dating Michelle, 25.
But Max has got a challenge on his hands - Michelle appears to be enjoying the single life, regularly tweeting about her nights out with the girls.
And she recently commented: "I'm sick of relationships. I don't want anything more to do with men."