Oh, I misinterpreted signals

The answer to any criticism for one's romantic choice.

Q: Why haven't you broken up with her like you said you would?
A: Oh, I misinterpreted signals.

Q: Why did you stalk her?
A: Oh, I misinterpreted signals.

Q: Why did you say that on your date?
A: Oh, I misinterpreted signals.

Q: Why did you not advance on her romantically?
A: Oh, I misinterpreted signals.

Q: Why didn't you have sex with her?
A: Oh, I misinterpreted signals.