As an INTJ; I love my alone time. However, I am not secluded and disconnected from the rest of society. With INFJs, we just get each other. Our introverted intuitions mean I can explain how I got to Z from A; and the INFJ would fill in the blank. Its refreshing.
As to how we end up together; I can’t say I know for sure. There isn’t a secret formula, or a hidden frequency we broadcast to attract other types we may deem compatible with. I personally like to scan the horizon before approaching someone. May this be at school, at a party, or during a work meeting. I don’t like being that one person in the corner by myself. I look at how they behave, how they act, how they speak; and usually the person I end up with can turn out to be an INFJ among two or three other types.
While initially I may spend just some time with just about any personality type; 2 min with the ENFJ, 2 min with the ENFP and 2 min with the INFJ; I usually find the 2 min I spent with the INFJ to be more fulfilling to the point where I may want to drag the 2 min to 5 min to 2 hours; and before we know it, we are both leaving our bubbles to create a new one to accommodate the other person.