What to do with my life?

So, I'm 17 about to start my senior year. I know what I'm going to do after school but..then what? I only have a plan that spans 2 years tops. After that I have no clue. I feel bad because it seems everyone I know has a set goal and career picked out but I have no idea where I'll be on 5 years.

I love writing but I want to do more than just write stories, I want people to be genially entertained and want to read what I write, if that's what I plan on doing. I LOVE video games; like more than just playing them, I love how they are made and how people react and are affected by them. I want to travel and see the world, but I also want a family and a stable career. There's just so much that seems conflicting that I'm having a hard time deciding what to do. Please be kind and serious with answers any help is appreciated. Any advice and tips are welcome.