Husband struggling during sex

Hi! Asking for advice…

My husband (33WM) has recently struggled to get it up or stay hard during sex. He claims it has nothing to do with me (35 WF) but it is hard for me not to get upset when it happens. He also isn’t really initiating the last couple of weeks. I do not think he would cheat on me but do you think he is checked out? We have been married ten years and he states he is still in love with me but the more this happens the more I get freaked out. Help