How do you feel when you first hear "I love you mum"?

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My son is 3 years old on 29 this month. I have not seen him for about half a year. Last night when we talk through the cell phone he said"I love you mum", again and again. I do not know who tell him this and of course I know he does not know the meaning of this. Even so, I'm surprised and very happy.I feel him grows up suddenly. I can not wait to see him. Did you have the same felling like me before?