This is too early to thing about this throughly, but I had two lucid dreams (one possibly fake, but that doesn’t mean anything here), and in both, thinking about RL suddenly waked me up.
In the first, I was scared that I hurt someone, thinked about if he/she’s hurt in RL waked me up.
In the second, I met my SC and I thinked about how I am going to have another lucid dreams where I’ll see him/her (a cat) again. And I also woke up suddenly.
This happening to anyone?
When you think of real life, you are pulling yourself back to your physical body…
Keep your consciousness in the dream if you wish to maintain there.
Where your thoughts are, you will be.
I think therefore I am - Rene Descartes
The solution is simple: don’t think about real life. It may be hard, but it’ll help you. Look around you and focus on the dream. Make sure you don’t lose lucidity though. 
I have get to my physical body, but not waken, then I got back to dream. I dont know how I do, anyone else who can weave into the dream like this 
I often got an LD by this phenomen 
It’s really hard to NOT think about RL, because the second this thought comes to me, I see myself lying in the bed, remembering the whole dream.
EDIT: Not a FA. I do reality checks.