First get that offer, which has of now you don't have.
Then, speak to your superior in a calm and personable way explaining that you have an offer with better conditions in other company, though you really like the work, the company and the people you work with, but at this point in your life money is an important issue for you.
There can be three outcomes. Or he bites the bait and offers you a raise, or he does not bite, and all keeps in the same, meaning also that you are disposable to him, and he might dump you at anytime. Or you accept the better offer and move on with your life.
Then, speak to your superior in a calm and personable way explaining that you have an offer with better conditions in other company, though you really like the work, the company and the people you work with, but at this point in your life money is an important issue for you.
There can be three outcomes. Or he bites the bait and offers you a raise, or he does not bite, and all keeps in the same, meaning also that you are disposable to him, and he might dump you at anytime. Or you accept the better offer and move on with your life.