My friend thinks he lives in my house?

Hey I’m 15 years old and I have a problem with my best friend. We’ve known each other since 4th grade and ever since that he always comes home to my house like he lives there. At first it was fun but as the days and years go I’m so annoyed and just want some alone time. Always after school he follows me home without asking if he can (just like if he lives there) everyday when we’re free from school he also just comes home to me and chill here. It’s not just the problem that he’s annoying but he also eats like all the food we have (he’s a big guy) and he plays all my video games because his family doesn’t have much money

What should I do? Many of my friends know my problem and they try to help me but they just say that I should confront him and tell him how I feel but it isn’t that easy because this has been going on for like 5 years. Yesterday he called me and when he calls me I have the chance to say no I don’t want to but today (now as I’m writing this he just came home to me without knocking on my door just like if he lives here. His mother always calls him to get home but just ignores her and he is very good at getting what he wants, if he wants to stay at my house for another 5 hours he begs his mother until she lets her if he wants to play a video game he begs and never gives up please help!!!