As a person who requires a TON of solitude, please do not walk on eggshells around her. A relationship goes both ways. Though my husband is also an introvert, he requires a normal-people level of social interaction that I have just had to compromise on. She needs to realize that some of her request is a little unreasonable and if she wants the relationship to work, she needs to come just a little bit out of her comfort zone. Not all at once because I can tell you from experience how incredibly overwhelming that is (it's be like if you went an entire week without talking to another soul, you'd feel a little crazy). Maybe you could try to gently bring that up with her, just that you're willing to bend, but that she needs to compromise a little too.