Two people tuned to feelings
Both use extraverted feeling (Fe), first for the ESFJ and second for the INFJ. They notice when the other is tired, sense when the mood at a party shifts, and genuinely want the other to be happy. Both place relationships near the top of their priorities, so commitment is rarely in question.
Each fills a gap. The INFJ helps the ESFJ step back and see the bigger picture. The ESFJ helps the INFJ turn plans and ideas into real steps, and coaxes them into a social life they might otherwise skip.
Small talk and big talk
At dinner the ESFJ asks about the day and wants the details: who said what at the meeting, how the new coworker seems. The INFJ would rather talk about why people stay in jobs they hate, or what a good life looks like. Neither is wrong, but each can feel the other is skating past what matters.
Talk it out now, or think it through first
When something hurts, the ESFJ wants to discuss it right away. The INFJ needs time alone to sort out how they feel before they can say much. So the ESFJ follows the INFJ from room to room asking “what’s wrong?”, and the INFJ, overwhelmed, withdraws further. The ESFJ reads that as rejection. Both feel misunderstood within ten minutes.
Social plans can strain things too. A weekend with two parties and a family lunch may delight the ESFJ and leave the INFJ drained for days.
Room for each way of processing
Agree on a phrase that means “I need time, I’m not leaving,” and a time to come back to the conversation, the same evening if possible. The ESFJ can trust that space isn’t distance. The INFJ can share a little before they have it all worked out. Balance the calendar, with quiet evenings planned as firmly as social ones, and make room for both kinds of conversation over a week.