my INFP friend is like that too. which made me think a long time ago that she's an INTPI have an INFP best friend. She's a really great person and I like being around her, save for my tendency to cling to her a lot and she tends to be rather unmotivated to go out with me. :x
True-- I seem to have more Ti/Te clashes with my friend though.From my experience: INFP and INTP have many surface similiarities, but don't underestimate the way that Ti and Fi styles of judgment can clash if the situation has the right mix of ingredients for it. As long as this can be managed (if ever an issue), I generally enjoy xNFPs.