I'm mad at my husband right now because he's in the shower.  

Everyday we wake up around 5 and while he's showering/using the bathroom, the run down to the corner store to get him a pack of cigarettes. 

This morning he was in the bathroom and I asked my usual "going to the store need anything? Were you going to shower this morning?" 

He says, "I didn't plan on it. Just the usual stuff." 

I ask if he wants to come with me and he says no. I hurry to and from the store so we'll have more to hang out before he leaves for work. 

When I got back inside, the shower was running and I know he's just standing in there jacking off like he does every other morning. 

I'm hurt over this stupid shit because it feels like he would rather be in there doing that than spending time with me. I wanna say all this shit that's gonna cause a fight between us like "oh I guess you found some good porn to watch." or "so much for spending the morning with me".

I feel stupid for being mad about shit like this. How do I let it go? 

Edit: I think I'm particularly sensitive about it today because my sex drive has been nonexistent lately. I told him about it and instead of talking to me about it, I feel like he's just spent more time in the shower because I can't give him what he needs/wants. Idk what to do. 