Does having a high metabolism makes you hungry all the time?

Yes , when i am at work i often get hungry and then i drink milk or coffee .

The first step is to not give a damn about your health. After that, eat whatever the hell you want with no restraint. If you haven't experienced severe pains in your stomach after two weeks, you know it's a safe diet. If you have, you can ask this question to a medical expert, since you'll need to see one then anyway.

I'm not too sure. My sister, she has a pretty high metabolism that no matter what she eats she seems to never put on the weight. But when I lived with her she wasn't always eating, mostly at meal times and if she wanted a snack. Either way I don't really have the answer. You could ask a doctor, they may have a better answer for you.. But be careful when it comes to salty foods, as you said you crave, if you have too much salt it could cause damage to your kidneys, not to scare you though.