Pride tends to get in the way when we have too much of it.


Here's a more chilled reply for you, one that has salvaging the relationship in mind:


Swallow your pride just this once (I promise you won't choke on it), then agree to take the test/s of his choosing, meaning he goes out to make the purchase (so no effort on your part) ON CONDITION that when the results are negative, he drops the ENTIRE subject, forever.


If he even thinks of mentioning drugs and your name in the same sentence after that, he is to seek immediate professional attention for his paranoid delusions.


And just to be clear, he leaves you out of the last part of the equation because its his issue, not a relationship issue.