Dear Diana,
When I called my boyfriend on his cell phone, I was surprised to hear his sister's voice. She told me that the number was for everyone in general while he has another number for those close and dear to him. I was taken aback as I had no clue that he had another cell phone number. We have been together for three months. Why did he hide his second cell phone number from me? Should I text him on that number or was it a sign not to text him?
— Akhila


Illustration/Amit Bandre 

Dear Akhila,
He hid an important aspect from you, so it is now up to you whether you want to continue in the relationship. It does appear that the very fact that he made his sister answer his call is a clear indication that he was dropping a hint. You need to ask him why he hid it from you. Depending on his reply decide whether you want to continue in the relationship.