I'm late on this post, but yes, I have had friendships with INTPs. Actually, I have six very close friends (ENFP, ESTP, INFJ, INTP, INTP, and ENFJ), and none of them share the same type except for the two INTPs. I am closest with the INFJ, but the INTPs I am second closest with I would say and.... INTPs are, like... the coolest people ever. They're, like, my favorite type xD I love INTPs. I love how they are, like... scientifically creative, and they really in the end just have this unique feel to them. I love the dreamy way they think and how much they think through things. I also like how I feel like I'm constantly learning more about them. I could go on, but I won't xD