First, let's calculate the total cost for the boxes of raisins. If each box costs $1.50 and all 5 of you want to buy your own box, the calculation would be:
\[ \text{Total cost for raisins} = 5 \text{ boxes} \times 1.50 = 7.50 \]
Next, we subtract the total cost of raisins from your total budget of $25:
\[ \text{Remaining money} = 25 - 7.50 = 17.50 \]
Now, let's find out how much money remains per person for popcorn and a drink. Since there are 5 of you, we need to divide the remaining money by 5:
\[ \text{Remaining money per person} = \frac{17.50}{5} = 3.50 \]
So, each person has $3.50 remaining to spend on popcorn and a drink. The answer is:
\[ \boxed{3.50} \]