Don't worry about friends. I know it sounds weird, but what you learned and how you use it is what's going to matter later in life, not your high school friends. You are all parting ways at the end of next year anyway. You will make friends wherever you go in life, and you can still stay in touch to these old ones thanks to the wonders of this modern world.
About the schools: sometimes these 'out of the box' ways aren't as creative as they seem, just a way to be considered innovative. Consider class size, characteristics of the student body, location, and other aspects of the school itself.
For a scholarship, as long as your grades don't drop, I think they will like that you challenged yourself with the experience of a new school. However, by staying at your old school you may have a chance to be ranked higher, etc., and the college isn't going to know the other school was an option.
Overall, I don't really know what you should do, and no one else can. Do what's right for you.
Also, btw, I think you posted this in the wrong section. Try High School Life next time.