A Social Network Website

I need a social network website. We like to make it wit coding and not using any software. Main Features: 1) There should be a 3 categories for what user is going to post. User should be able to select only 1 category for his post. There should be a wall or page for each category. So if categories are: Sport, Food, Vacation. There should be 3 public page feed up with one of those categories. Other members who are interested in Food they go to Food page and see all the posts related to Food. For sport and Vacation same. 2) Subscription feature. User X subscribes user Y. Anything that user Y posts, User X somehow will be notified. 3) User is able to share video, pictures and text. 4) The interface should be close to Facebook but not that much because of copyrights issues. 5) Regular features like, commenting on the posts, like button, add request, photos, etc. Lesser bid better chance! ONLY PROFESSIONAL PEOPLE!