No one knows why he is behaving a certain way but him. He may be acting passive aggressively and this is a sign of something deeper. Sometimes people do not express their feelings directly so they choose to express that through their actions. You can only try to approach him about his behavior and why he is behaving this way. It is not beneficial to guess or try to figure out his purpose. Tell him that you feel that his feelings are different and to explain to you why he is being distant. That gives him an opening to explain why he is feeling negatively. He may not feel that he loves you less but is expressing a problem that you may or may not know about. Do your relationship a favor and find out what the real problem is. You can offer to attend couples counseling since you are actually separated. That is the perfect time to have a professional intervene to see if the relationship can get back on track.
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