John 7:8,10 KJV
Go ye up unto this feast: I go not up yet unto this feast; for my time is not yet full come.
 But when his brethren were gone up, then went he also up unto the feast, not openly, but as it were in secret.
No matter how close or not you are to someone, it is not everyone you should tell your plans to. Human beings are unpredictable, and if the paradigm in the relationship changes, they may use your secrets against you. “Be careful who you open up to. Only a few people actually care, the rest are just curious” (Unknown).