If you refer to Netflix as your "only friend," it's best that you get out more.
Movie: The Wall of Street (2013)
Staying in is always good to do. Sometimes you just want to wind down by yourself, order some food, pour a glass wine, and watch a couple movies. Everyone has those moments. But it's always good to go out and give people a taste of your extroverted side. That doesn't necessarily mean that you need to hit Hollywood and Vine every night. Bars, arcades, and your friend's house are all legit options.
If you stay in way too much, chances are you'll become like SpongeBob in that one episode where his only friends are a used napkin, penny, and chip. And if there's any type of SpongeBob you don't want to be, it's that one.