Valentine, Nebraska has a special "Cupid's Mailbox" that forwards your cards with a special Valentine's stamp
It's too late now, but if you want to give your beautiful love letter a little extra *something* for Valentine's day, you may want to try sending it to this town in Nebraska.
The town has a special series of cancellation stamps that relate to the St. Valentine's day. What people do is they send them their love mail inside larger envelopes. The town will open the large envelopes, stamp your love letter and send it with a special Valentine stamp on it.
The deadline is usually February 5th. What you need to do is put your valentine card (with postage and everything!) inside a bigger envelope and send it to "Cupid's Mailbox" PO Box 201, Valentine, NE 69201.