No one is entitled to know your business if you choose not to volunteer the information. Mature people accept that. Tiny, jealous people rush to judgement, looking for or creating nefarious possibilities because they can't handle being out of the loop.
In life you will realize that there is a purpose for everyone you meet. Some will test you, some will use you, and some will teach you. But most important are the ones that bring out the best in you. Those are the ones worth keeping around. :) So true.