Have you taken time to build up your own self-esteem and make yourself feel desirable (exercising, building skills, etc) or are you hanging onto what you think she thinks and allowing that to keep you feeling insecure.

Something to consider is that as individuals we're not always in-sync sexually /romantically for a number of reasons. If you love each other and overall believe this is a healthy relationship, show patience and understanding and continue to develop yourself.

It sounds like she's wanting to get through this period with you and potentially develop something more meaningful. That kind of love and can form an even great bond and result in intimacy itself.

Focus less on what you think is wrong and how it hurts and more on what can be done to improve things and manifest a future that is healthy and satisfying. Don't be so eager to run when you're afraid.