Sharing is Caring?

Salam,
Sharing is Caring. Then should we share everything? My mom always said that i am a stingy person. Well for me, i think it is my biggest problem. Sometimes, i do admit it. I have problems in sharing my things. Maybe i am a person who is not good at sharing. I just wonder how can these people keep borrowing other people's stuff everyday. If it is once in a while, it is ok to me. But, it is just to much if you like to borrow other people's stuff just to show off. I really dislike this kind of person. Sometimes, i do meet this kind of person in my life and it is really hard to keep my patience in me.huhu. Please pray for me so that i can change my bad attitudes and become a better person. InsyaAllah.