Hi. I am sorry to hear of this space. What is troubling is that you are feeling it and have tried to talk to her about it and she shuts down the conversation about it by saying sorry you feel this way rather than asking what can she do to have you both feel more connected? I would go to her again in a quiet and loving moment and let her know how much you love her and miss the closeness and ask her if her feelings have changed and that you are open to hearing anything about what she feels. When you speak with her try not to finger point at her behavior changing but focus more on what you feel and wondering if she still feels as close. If her feelings have changed she may just be afraid to approach it and feel defensive about it as she displayed by saying sorry you feel that way. That response is the coldness that you mention. Go to her with your open and loving heart and ask her how to feel close again for both of you.