I've developed feelings for a married woman. We are pretty close. We've become fast friends, and have been hanging out somewhat regularly as on double dates with our partners although mostly just us two. We've never discussed anything sexual between us, although she does somewhat frequently mention how attractive I am..

What can I do?

1) Cut off contact; I'd prefer not to do this.
2) Tell her how I feel, with the intent that if they aren't reciprocated, I'll get over it.
3) Do nothing and continue to suffer on the inside until something changes.

Please help me, I've been struggling with this for months.