Well, you broke one of the unofficial commandments of business. 'Don't accept a position where a friend is your boss'.

Most bosses are far and away different from the person you knew outside your office. In an attempt to not show favoritism, your boss will cease to be your friend and will put expectations upon you that she wouldn't put upon another employee. Part of the reason for this is that she doesn't want the other employees to think that you are not pulling your share. So you end up with more than your share.

Your now boss doesn't want to think that you are above discipline and will find consequences that may be overlooked or not treated as harshly with other employees because she wants to show other employees that she is going to let you know about your errors and not gloss over them.

She may feel that if she spends more time with you giving direction, acting as a mentor, showing you how to accomplish tasks that are not necessarily yours and other employees have requested to be shown, the other employees will feel unappreciated and might complain to the bigger bosses about unfair treatment, etc.

The same things go for you. As you entered this new position, you had expectations that were higher than a candidate who did not know this boss socially. Because of this, you are feeling let down that your hopes are not being realized in the manner you wanted them to be.

If you want to remain friends with her and keep working in that position, you will both need to lower your expectations of each other. For the time being, you need to do your job as described when you were promoted to the position and your boss needs to let you do it with disruption of micro managing. After you both have had the opportunity to adjust and the other employees realize that unfair working conditions will not be a factor, then you can approach the subject of aspects of your job and her job that need further direction as a means of mentoring.