So here's what you need:
3 ½ cups water
1 ¾ cups ground coffee
Mix that together in a big pitcher.
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Cover it up, and let it steep for at least 12 hours, but not more than 24 hours, at room temperature. Then, give everything one more stir (to loosen up the coffee grounds TRUST ME ON THIS ONE), and strain your mixture through a coffee filter.
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Pour your coffee concentrate into a bottle and park that baby in the fridge until it's chilled.
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Now, it's important to note that what you've made is actually a coffee concentrate, so when the time for drinking comes, you're probably going to want to dilute it with at least an equal amount of water.
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Serve that over ice with a little milk and simple syrup (if you like), have your boyfriend make you one of his world-famous omelets, and get ready to face whatever new horrors life decides to chuck directly at your face.