Is it normal to feel this way.

I'm 23 years old and I'm moving out of my parents house for the first time and In with my boyfriend of 5 years. I'm super excited and happy to live with my boyfriend but It seems like the sadness of leaving home and my parents all alone is outweighing the excitement and I feel like crying. I know this needs to happen and I can't live at home forever... and my life at home isnt the best with my parents either but I feel like there is this weight on my chest and I haven't even moved out yet. Is this normal to feel?