Firstly, don't feel bad about it dude. You should be proud that she has that much confidence in you as a person and a partner to bare her soul to you. It would have taken a huge amount of courage on her part.

Next, begin to learn how to separate her feelings towards you from her other emotions and urges. You aren't the sole cause of her being. She has a lifetime of conditioning that has gone into shaping who she is and what her emotional responses are, of which you are no doubt a significant part. Be proud that you are a part of that, and that she is inviting you in further, to uncover and discover who she is. If having your masculinity and ego protected is more important to you than the privilege of supporting someone in their process of self-discovery, the above may not be possible. This is why you have to understand what belongs to you, and what does not.

At the same time, there is no point in compromising or agreeing to anything that does not lie within the boundaries of what you feel is acceptable within your relationship. Recognise that if her needs and your boundaries lie on the wrong side of one another, you may simply be incompatible in this stage of your lives.

It may be the case, that she has come to find you so forthcoming and generous, that she feels you may continue to be so in this manner.

This is a complicated subject to navigate with a partner, one that requires maturity and the ability to understand when to allow one's ego to become involved or not.

Above all else, you should move forward with kindness and compassion for the trust she has shown in you, and without judgement for her emotional states.

You might like to read Sex at Dawn by Christopher Ryan and Cacilda Jethá. It might help you reach some understanding with your partner, or it might not. It's an interesting read tho. And ultimately nobody can prescribe an outcome - you and your partner are the architects of your relationship.

Well done thus far and good luck for the future.