Why would your parents tell the elders? In the first instance as your parents, they are the ones who should be talking to you and giving you guidance. They are parents!
On what basis would you be disfellowshiped? So your parents saw some messages. Delete them. Tell them you had a moment of weakness and be more careful in future.
Since you say your boyfriend is in India, I assume you are not. It would be a stretch to disfellowship you on immorality grounds in that case.
Take a deep breath and play it smart. You now know who you can and cannot trust.