If you had feelings for someone else, do you consider it a form of cheating?

Feelings involved are more than a simple crush, although you’d never act on it. The other person is a very significant person in your life, but you know she’s off limits. There will never be anything between you, but the feelings are strong and she probably knows, as she can read you like an open book.

Still, do you consider it a form of cheating on your partner?

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I could have included a poll, but the odds are slightly towards a clear 'no' (10), with 7 a clear 'yes'. All opnions are welcome and helpful.
If you had feelings for someone else, do you consider it a form of cheating?
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