Waking Up When Becoming Lucid?

For the past week I have had about 5 lucid dreams. That is the most that I had ever had. The problem was that every time I would become lucid everything in my dream slowly fades away and turns white and then I wake up. Why is this happening? I have read that getting overly excited can cause some people to wake up but I have been trying not to get excited and I still wake up.

My First Lucid From This Week: I am down at my grandma's house, and my dad is there which is illogical because my dad has recently died and I started to realized that I was dreaming. Then everything slowly faded away and turned into a white haze and for some reason I knew I was waking up.

Any help with this? It is pretty frustrating.

If you expect to wake up you probaly will, also try to follow some dream stabilizing tutorials.

^^ yup. Once you're lucid try grabbing things or staring at your hands.

Or just remember to tell yourself in the dream, that you are dreaming and that you will have a nice long dream. Doing the other methods as well of course (like rubbing hands together).