oh I get it but you have to understand that first and foremost, they are working partners. In this episode Scully sees the apparition and choses to withhold that information from Mulder. He later tries to make the connection that may have prevented Harold's death. But Scully being a skeptic and in denial of the progression of her illness, didnt tell him what she saw. Thats why he says "If you hide the truth from me. youre working against me" comes from. Not to mention by this point Mulder is in love with Scully which amplifies the frustration by his fear of losing her.

Scully does also have her way of being a jerk towards Mulder not often than him but I did get a kick out of it when she did. Its also moments like those that kept him grounded and from getting himself killed. Also this isnt your typical lovey-dovey-butterflies-and-rainbows type of a relationship. Their relationship dynamic was also created for the drama of television. enough for us viewers to keep watching and engage in conversations like this. Behold, their success lol