I think her feelings of love for you were complicated by her feelings of friendship toward you -- the ideal love is a combination of the two feelings, don't you think? Further, as the husband of her friend, you were/are unattainable, and there's nothing like forbidden fruit to keep a feeling going.

She behaved honourably, and you must respect that. I think any moves toward resuming the friendship must be hers, as she is the one who has the problem and must decide how to resolve it.