I know the transition to no feedings at night can be quite difficult, especially since in some ways it is nice quiet time with the baby. And how could something so small go so long without eating?!?!?
All three of my kids stopped eating in the night by 4 months old - they were all similarly in the high percentiles which is why my dr. said that they didn't do the middle of the night feeding anymore. I started by doing last feeding at 11:00 and letting them go through the night (I did CIO, but there are other methods for sleep training as well if you aren't comfortable with that). Then every few days I moved the feeding back 15 minutes. I did control it and wake them up so that I could preserve the long sleep through the night. Eventually they ended up going to sleep between 6:30 and 7:00 and waking up between 6:00 and 7:00 for the day.
I hope that helps. I wish you luck!