Speaking at the premiere of his classical composition 'Ecce Cor Meum' (Behold My Heart) in London on Friday, the former Beatles singer said he was not the type of person who bore grudges or blamed others for the sadnesses in his life.

"There are certain things in life that are personal and I think a relationship with a partner is intensely personal and I prefer to keep it that way, " the musician said McCartney (64) and former model Mills (38) announced their separation in May, blaming media intrusion for the failure of their marriage. The divorce has since turned into a public battle for sympathy fought in the media spotlight.

"I think when you are going through difficulties, the thing to do, for sake of all the people concerned, is to keep a certain dignity and remember that it is a private affair, " McCartney said.

"That way, you will probably get through it better, you will put less noses out of joint and I think it's a more dignified way to go about it. So that's what I try to do."

"Even through difficult moments, I like to try and look to the other side and think there'll come a time when I'll feel better."

Last month, McCartney's lawyers said he would vigorously defend himself against accusations, contained in supposedly leaked divorce papers, that he mistreated Mills during their four-year marriage.

She has recently launched legal actions against several newspapers.