Well you don't believe that he is attracted to you because he does not pursue you sexually. This is ENTIRELY understandable. I think all the HDW's have been there. And there is a LARGE portion of truth in that statement--if someone says they are sexually attracted to you, then they would logically want to be with you sexually, right!
I found that reading Passionate Marriage (the very first relationship book I ever read) helped with this a lot. If I was sexy and attractive BEFORE I met my H, then why would that have changed? However, I believe what you are saying is that you are not certain if you are attractive to him. The only thing that really eliminated this nagging question in my mind was him taking a sexual interest in me. All the other stuff was just him blowing sunshine up my dress. I needed action.
But I would still say that this is not "the real issue". If his equipment is not working properly, how is that a reflection on how attracted he is to you? I can see how utterly tempting it would be to give in to this type of thinking but I don't see this as the core problem. JMO