Falled in love to a coworker?

Like the title says... plus she is already in relationship. We have gotten close, have admited each other pretty personal stuff and she have said she wants out of her relationship since she is miserable in it and have said she can't wait till her kid gets 18 ... We have hanged out and she have said "we should hang out for some more" but when i tell her to hangout then always she is too busy. But AT work she invites me for smoke and coffee in the workplace kitchen. Sometimes i just have feeling she just use me for ego boost, since i get lot of attention from coworkers. What should i do? Tell her how i feel about her? Or what?

Falled in love to a coworker?
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