"Furthermore I worry that by changing she might feel I'm not interested in her anymore?" - never
I think you have the concept down. And are starting to learn.
What you need to do is Pull Back - give her some sapce. Have her contact you when she's ready. Your interest level is way too high here.
And yes, she WILL live if you are an agreeable, sick puppy dog. She doesn't want another 'girlfriend' - she wants a MAN!
You did need more things in your life - women are a part of your life - NOT YOUR LIFE. School, work, WORKING OUT OUT, FRIENDS, FAMILY, Hobbies are jus tas important.
It's NOT changing who you are - it's learn to grow up and mature - become a man. Learning about women.
You just need to grow a spine and learn to say NO! Say no, I am going out with my friends.
Less is more with women - the less contact and less they see you - the more they reach for you.