What do you do when???......?

a sister of ures tries to get ure confidence down. Ok she has been hurt in the past that doesnt mean i will get hurt too. I am already 26 now. She is always letting my confidence down. You know we all live differently. There is a guy who likes me. He has liked me for quite sometime. Only he and i know what goes between us. He keeps staring at me and i know it is love. But she keeps coming in between and putting me down.