Definitely! Haven't you ever met a person, and after interacting with them for a bit your first impression changed? He/she was either more or less attractive based on their personality?
Well, I think that also applies here. The way that you think/feel about yourself is projected through your facial, body and verbal expressions. Those who you interact with will react to what you are projecting -- and you react to that!! kinda like a mirror image.
So, feel good, be positive, project this and you will receive positive reinforcement through conversation, body language and other cues. This in turn will increase the positive feelings you have. Which i believe will actually help "reverse the aging process". ;) good luck!