Question

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Answer 1

A secret.

Step-by-step explanation:

If you have a secret you can share it but when you share it with someone it will no longer be a secret.

Answer 2

Secret

Step-by-step explanation:

IF you got a secret, you'd want to share it.

But IF you share it, you didn't keep your secret.

Then you'd have no secret.