I know you are 16 years old and yes, you have probably lived a lifetime in those 16 years. I mean you must have because you have already had one volume of your memoirs published and have several more to go. Yes, I have made fun of you and chastised your parents, but I am just full of advice so here is a little more for you.
I read today that you stopped Tweeting. Although I am iffy on Twitter I think your reasons for stopping is something you may regret. In your last Tweet you said, "FYI Liam doesn't have a Twitter and he wants ME to delete mine with good reason."
Here is your life lesson. Don't ever stop doing something innocuous just because your significant other doesn't want you doing it. Sure, if you are doing drugs or about to jump off a building or set to watch an episode of Living Lohan then by all means listen to your significant other, but stopping something you obviously love doing just because he doesn't want you to do is a step in the wrong direction.
You need to live your own life and not live it according to the wishes or wants or desires of another person. Don't live your life to please your parents or your boyfriend or your friends. Live your life for you. In every relationship there are compromises, but this isn't a compromise, it is a demand. Once you start acceding to his demands it is a very slippery ride to having no control over you or who you are.
If you turned off your Twitter account because you were tired of doing it, then great, but if you turned it off because Liam doesn't have one or doesn't want you to have one, then you need to think about what you want and what makes you happy. Liam will probably go away. I know you don't think so, but the chances are the two of you will break up and you will regret doing what he told you to do, and not making decisions that affect you, on your own.