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- Personally I feel that in this type of relationship the ISFJ gets the short end of the stick. But everyone is different and I do not speak for everyone.
- I feel like it's harder on the ISFJ too, who doesn't get the emotional affirmation they really want if the INTP is not mature or experienced. The INTP will create space for themselves if not given it freely by just withdrawing, whether that means avoiding physical proximity ("going into the cave" if they live together, just avoiding them if not) OR even when the two are together, the INTP will disappear into the thought world and not really be engaged even if they are present. The ISFJ doesn't have this sort of release/escape, due to the desire for companionship and interaction with the loved one.»
— http://personalitycafe.com/isfj-forum-nurturers/6532-intp-isfj.html