Beaumont,

From your profile, you are young and I'm sure that money is an issue....but your safety and the safety of others is more important than $$. Here is a suggestion:

1. Dont drive the truck with a leaking tank. Dont park it where the thing could damage other property should it catch fire.
2. If it is dripping, dont park it on asphalt.....gasoline dissolves asphalt.
3. Fuel tank leaks typically are of two kinds, splits or pinhole leaks. Splits occur from vibration or from damage like a dent. Pinhole leaks occur from corrosion....like where there was dirt under a strap and the dirt gets wet causing the tank to corrode.
4. Tanks DO NOT heal.
5. Contact some radiator shops in your area. Those type of shops used to patch gas tanks by soldering.....they could immerse the tank and solder a seam. They could also clean out the interior before soldering.
7. Look on the internet for replacement tanks to get a price. Also, you have a remote chance of a junkyard find but most of them are as bad as yours
6. The leak it going to get worse. At today's prices, leaking out 10 gallons is the same as buying a new tank.

Dont risk your body!!! A cup of gas can blow up an entire garage!! I have witnessed it done!!!