The attitude and judgements of the others around you may have an impact on you. You will feel happy, proud when you are appreciated. And vice versa, you will feel ashamed and embarrassed because of some bad judgements.
But sometimes you shouldn’t feel embarrassed at all. This is: the outfit that you are wearing, your friends who are not rich, your old parents and your simple life.
Because those are the people that you love and they love you. Because that outfit is suitable for your situation, for your life. Because that simple life is your choice.
And those people and those things which are valued to you, you can absolutely be proud of. No one can underestimate your valuable things.