Student or Learner
Is the following sentence natural? Here by ‘company’ I mean hanging out together. I would appreciate it if you could throw in a few variations of the sentence.
I think your company has created a big change in his behavior.
You are having an influence on him.
Being with you has changed his behavior.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.