I'm going to ditch my friends last minute to spend time with my partner
Could you tell me why you want to ditch your friends?
I'm feeling insecure about myself. I'm afraid that they will not like me.
I get that you want t be with your partner but it's rude to cancel plans at last moment. People make time for prearranged trips, you're wasting their time for no reason.
Whatever, I don't care about anyone in my life. I'm a narcissist.
That doesn't sound true or else you wouldn't be worried that your friends won't like you, and the easiest way to handle this is by spending more time with them. Don't run away from people who care about you.