So wedding shopping is suppose to be a happy time, my dad kinda ruined

Ok today I went wedding dress shopping with my mom and my dad, my dad said he wanted to be a part of it because he wasn't able to dress shop with my sister, so I scheduled the dress shopping today and made sure it was a time he could make it. The whole time we were wedding dress shopping he acted like he didn't want to be their, when I was trying to dresses he didn't even smile. My mom was so happy but my dad acted like he was pissed off that he was there. He's pretty much been like this about most of the wedding stuff, acts like he doesn't care, I'm to the point where I rather just go to the courthouse and get married. He's ruining this whole experience for me because he has such a poor attitude, any other time he's happy.