David–I’m so sorry to hear about your situation.  I must admit, I was that girl recently.  It’s really tough to admit that you’re not in a good place to continue the relationship, especially one with an immense connection.  But it’s so important to let people go through their own journey to get to a place where they are capable of receiving love.  
I agree with Anita.  There’s no harm in checking in with her intermittently as a friend.  Someone did that for me and it helped me realize how supportive and trustworthy he was.  You should be sure to move forward with your life though.  I wish you the best of luck!