Two things:

1. Find something different to read. Maybe you need a change of author, genre, etc.
2. Add more discipline to your life to focus on your reading. Set a time, early AM works best in my opinion, and stick to it. The caveat to this is start small. For instance, set a timer for 20 mins and read. Increase your time every month and work up to longer time reading (do not use your phone as your timer).

Eventually you will set a routine and it will become a habit. This is true with most things in life.