Here's the truth- women know. I'm aware every straight male I'm friends with would 100% sleep with me given the chance or opportunity. Some are just more respectful than others.

If she had any type of romantic feelings for you she knows it can and will be reciprocated if she wanted to.

Best case scenario she'll think good for him for being honest maybe now he can get over it and move on to someone who feels the same. Worst case she'll think it's selfish and the friendship will fade.

Any time in the past I've 'confessed' feelings for someone when I'm not positive they feel the same it's been regrettable at best and humiliating at worst.