Moving with him!

So I'm moving to Nevada with my boyfriend of 2 years and 9 months. Everyday we are together is great and we leave November 5th less than two weeks away. We both stay in Texas together right now and this is where my mom is and my other family either here or Louisiana. His family is here as well. He is so excited about moving away and well me on the other hand I don't know. I want to go but for some reason the move hasn't  set in fully for me to feel anything. I'm not sure why that is but when it do sit in I don't know how I will react. How should I come to terms with it? I don't want to get on plane and then have a break down. Ugh!