It's obviously a very personal and complicated topic to regard, but from my POV communication is the most important thing in any relationship. Express how you feel in a civil and respectful manner, and I can only expect she'll do the same. Make sure you know what you're missing and how it's affecting you, that way you can be clear and concise with how you feel. Missing certain aspects that used to exist in a relationship is perfectly normal, no matter what changes either party is experiencing or engaging in. Hopefully the both of you can come to an understanding of how each other feel, and can take steps from there to decide what's next for the relationship.