AceShowbiz -

Are wedding bells on the way for Ariana Grande and Mac Miller? Rumor has it, the "Dangerous Woman" hitmaker is ready to marry her boyfriend after facing the unthinkable tragedy at her Manchester concert back in May.

"The attack completely changed Ariana's outlook on life," a source tells In Touch, "She's learned that what matters most are the people that you love - and that's Mac. She has no doubt in her mind that he's the man she's supposed to be with."

According to the source, Ariana tells her inner circle that the rapper "is the one and that she wants to marry him as soon as possible."

Ariana sparked engagement rumors after she was spotted wearing a diamond ring on that finger during a recent benefit concert in Manchester. However, the source confirms that the couple is not engaged yet.

Prior to her relationship with Mac, Ariana was romantically linked to Big Sean, Nathan Skyes and Jai Brooks.