ugh, do I really need to pay my roommate for the upgraded the wifi?
Why don't you want to pay for the upgrade? Do you think you will use it?
No, I'm afraid that he's going to disable my wifi, I don't need an upgraded one
It sounds like you are happy with your current level of wifi service. You don't have to pay for an upgraded service if you don't want the service. Tell your roommate you will continue to pay what you currently pay and he can pay the upgraded amount if he chooses to get it.
I'm going to do whatever I want and I will tell him what I'm gonna do.
Your roommate should have asked you before upgrading the wifi and you're within your rights not to pay extra for it. You should get your own wifi.