<human>: When we met, my boyfriend had just gotten a puppy about a month earlier.  I love the dog, and he has become "our dog" for the most part, as we live together now.

Lately, I've been feeling like I'm a third wheel in my boyfriends relationship with the dog.  He regularly ignores me in favour of the dog, and it's really starting to bother me.  This morning, he brought the dog in the shower with us, and it was the last straw for my patience.

Having the dog in the shower isn't totally uncommon, sometimes we'll bring him in after we shower to shampoo him.  Today though, I asked my boyfriend to come shower with me and he brought the dog without asking.

When he asked why I was upset, I told him that I was feeling like the third wheel.  He laughed and said (jokingly) that I am the third wheel, the dog was here first.  I walked away crying and sat on the couch by myself.  It's been almost an hour, and he still hasn't said anything to me.  Usually we can talk through stuff like this and be okay, but he doesn't even seem like he wants to talk.  What do I do?

Can you condense the text into a few key points?
<bot>: my boyfriend ignores me in favour of his dog.  I brought it up today and he said it's because he had the dog first, so of course the dog is more important.  Now he won't talk to me.