What would attract an INTP to an ISFP anyway?
On top of what Edge said - independence. I don't think I've ever felt like
I was the needy one in the relationship, before. Which, in a way, is a good thing for me. I can't vouch for other INTPs, but I like it when I actually want the person, as opposed to the other way around. We both need a lot of space and privacy to do our own thing. Of course, the only problem is when one person wants some luvin' while the other person has still yet to reappear back on the face of the Earth.
This is most likely an individual thing rather than a type thing, but my ISFP and I are both "actors" in love language. As in, rather than verbalising our feelings, we show them through actions. I don't think the words "I love you" have even been exchanged?

But they've definitely been
shown.
There is a bit of a communication problem - the ISFP trying to keep up with my sporadic Ne-thinking - but I keep the pace slow and save the hypothetical nonsense for conversations with my ENTP friend.
Plus, with her being a culinary arts major, she can rustle up a pretty good meal.

Which is a bonus, because my culinary skills range from scrambled eggs to microwaving jacket potatoes.