As the online social networks (OSNs), such as Facebook, witness explosive growth, the privacy challenges gain critical consideration from governmental and law agencies due to concentration of vast amount of personal information within a single administrative domain. In this paper, we demonstrate a privacy-aware decentralized OSN called My3, where users can exercise full access control on their data. Our system exploits trust relationships in the social network for providing the necessary decentralized storage infrastructure. By taking users' geographical locations and online time statistics into account, it also addresses availability and storage performance issues.