Love letters

At lunch time I went to the post office to buy some envelopes, it was much cheaper to buy a big packet of them and I will use them eventually so picked up a pack of 50. When I was paying for them the bloke behind the counter accused me of writing too many love letters! When I told him I didn't have any one to write love letters to he said that I should hurry up and find myself someone because when you are old there is no one to write to!!! So there you go, I consider myself told...I need to find a man (and fast apparently!)