Let's talk about them!
My best friends have always been gamma or delta (though I've dated both alpha and beta people, SEI and IEI respectively) but right now I'm becoming pretty close with a beta NF girl and I don't think either of us expected it, lol. Our lifestyles are almost identical and relating is just vey easy for that reason, though most of what we talk about isn't "real life" stuff, but our interests. We trade metric tons of ideas in a very satisfying way (we're pursuing complementary majors in college as well) and it's just refreshig sometimes to talk to someone who has similar experiences and expectations. Also, I think delta NFs sometimes enjoy being around types from other quadras whom they can be less... "good" with. Ahaha.