I'm going to keep a secret from a long time friend
Is there something wrong with keeping a secret from a friend?
No, but there are some things I don't want him to know.
I see where you are coming from and I suppose some secrets are meant to be kept as a secret. I guess everyone has secrets so it's nothing abnormal if you don't want to tell you friend. Just be careful that your friend doesn't end up finding out or you will look terrible as a friend.
It will be a secret and I those things did come across my mind.
That's good that you know the consequences of keeping a secret from people. If it doesn't hurt someone, then keep it to yourself.