We carry the people who have been important in our lives with us all the time. Your therapist lives on in your memories of her and in all the good work the two of you did together. If you pause and think, you can probably hear her voice. In a lot of situations, if you ask yourself, I'll bet you'll know what she'd say. It's not the same, of course, but it's something.
I'm sorry for your loss, but I'm really glad that you had someone like her in your life at a time when you needed her so badly, and I'm glad that she helped you so well. The world is full of good people, although they can be hard to find. I don't think we can replace one person with another, but I'm hoping you find more good people to fill your life. As far as how do you cry, I don't know. Like everyone else said, there are a lot of ways to grieve. You'll cry when it's the right time for you to cry.
Sometimes it helps to talk about things, and you can sure do that here. I'm sure we'd all like to hear the story of the two of you. She must have been remarkable person and I know I'd like to hear more about her.