raise my self-esteem

If I was not me, and I saw myself walking in the halls at school or somewhere else, I would not think the same thing I think about myself like I am now. I wouldnt be so hard on myself for many different things. Like for example my appearance.. If I saw myself walking around I’d think that I am prettier than I say I am now. Also, I’d say I’m a good drawer and creative. But because I am me and not another person, I’m harder myself, and what I do is never good enough for me. So even if I was someone I look up to, I’d still be hard on myself. (hopefully what i’m saying makes sence to whoevers reading this – i dont know how else to explain.) So basicly I’m not being fair to myself, and now I know what I need to change.

How do you raise up your self esteem if theres this one person who puts you down, but you dont want to let go of them? (no, its not a boyfriend. a best friend actually that’s way too hard on everyone, not only me) In other words, how do you ignore that person/learn to not care what they think?