I'm pretty introverted. I only like to talk and interact with people I know. The only way to tell the difference is see how you do in a group of close friends who you are comfortable with. A regular person would never be able to tell if I was an ENTP unless they were an ENTP themselves because I don't play aggressively around with random people. In their eyes, I'm just introverted (INXX).
Here's how I separate myself and type. If you just talk non-stop, finding things and topics to say, joking, having fun, pranking, jumping around in the circle of close friends and all the while using your thinking to do these things, chances are you're an ENTP. Here's the most important point though, when the party you're at, which you enjoy, ends, do you want to continue the party or go home? That is the difference between extroversion and introversion.
Here's how I separate myself and type. If you just talk non-stop, finding things and topics to say, joking, having fun, pranking, jumping around in the circle of close friends and all the while using your thinking to do these things, chances are you're an ENTP. Here's the most important point though, when the party you're at, which you enjoy, ends, do you want to continue the party or go home? That is the difference between extroversion and introversion.