Speak to her and let her know of your concerns. You never know, she might not think there is a problem. Is she still affectionate with you in any other way i.e. do you still hug each other etc? If so, she might not feel the need to be verbally affectionate or think there is a problem. Just be calm when you tell her your concerns and try to keep the conversation in this manner as I'm sure the last thing you want is for it to turn into an argument.
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The only person in the world that can truly make you happy is yourself.