Actress Amber Heard is allegedly having second thoughts about spending the rest of her life with actor Johnny Depp due to his "awful mood swings" and "erratic behavior".

Heard is said to be getting annoyed with Depp's actions, and had suddenly re-evaluated her relationship with the actor after he appeared drunk while presenting at an awards ceremony in Los Angeles just last month.

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The actress reportedly felt that Depp's behavior reflected badly on her.

The 28-year old star confirmed their engagement just last January, but is said to be getting cold feet, knowing that she isn't ready to settle down yet and become a wife.

For his part, Depp is said to be "crazy in love" with the actress, but the big age gap is causing constant problems and seemingly irreconcilable turmoil between the two.

Heard, who previously confirmed her bisexuality, is said to still be interested in meeting other people, and when the opportunity arises, still flirts with both men and women.

"She's realizing she might be happier with someone else," a source shared of Heard who has been dating 51-year old Depp for less than two years.

At the moment, however, Heard has not made any moves to call off her engagement with the actor who has two children with his former live-in partner, French actress Vanessa Paradis.

"It'll be a small ceremony on Amber Beach, part of his island in the Bahamas, that's named after her. They'll only invite close friends and family," an insider had previously shared with Us Weekly.

Paradis, on the other hand, is said to be blaming Heard for Depp's recurring alcohol problem.

A source to Paradis previously shared that the actress blames Heard for the actor's midlife crisis, and feels that the younger starlet isn't mature or strong enough to handle Depp's drinking problem.

TagsAmber Heard, Johnny Depp, Vanessa Paradis