We no longer sleep together... should I be concerned?

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So for the past couple weeks my husband and I haven’t been sleeping together and I didn’t really notice it at first. So I work from 10pm and get off at 6am. Whenever I come home my husband would be sleeping in the bed. Lately when I’ve been coming home he’s sleep on the couch, I wake him up and tell him to come to bed with me and he stays on the couch, not in a rude manner. We haven’t argued or anything. We had sex and cook dinner the other day. There isn’t much tension so I feel weird for asking because I don’t want it to seem like I’m overreacting. So I sleep in the bed by myself which is okay sometimes cause I’m too exhausted to care . Also, he normally wakes me up and we start our day. It’s just weird and I guess I’m asking if you ladies think I should be concerned or not.