It is not just ESFP thing, but a characteristic found in all extraverts to some extend or another. Their mind works more horizontally - get as much surface knowledge as you can - rather than vertically as it works for introverts - get as much in-depth knowledge as you can. If I had a one-on-one relationship with an extravert who didn't really hang out with anyone else, I project that both of us will be unhappy as a result - me for betting poked more when I want to introvert and extravert for not getting enough reaction from me.
I was in a relationship with someone who was moderate extravert and we just had those times where each of us did our own thing. He was engaged with his extraverted activities. I was busy with my introverted ones. I don't remember myself wanting to have more of a monopoly on him with respect to personal relations. To the contrary, I enjoyed it when he would introduce me to some new friend of his. So it worked out pretty well this way for years.
If you use the search function there are actually plenty of threads about INFJs and ESFPs - seems like a common relationship pairing. They are kind of related to ENFPs but do relate better to other sensors. I think INFJs are kind of more boring for them. I know my ISFJ mother tends to draw ESFPs to herself quite a bit, in fact I think that this is the most common type of friendship for her.
I was in a relationship with someone who was moderate extravert and we just had those times where each of us did our own thing. He was engaged with his extraverted activities. I was busy with my introverted ones. I don't remember myself wanting to have more of a monopoly on him with respect to personal relations. To the contrary, I enjoyed it when he would introduce me to some new friend of his. So it worked out pretty well this way for years.
If you use the search function there are actually plenty of threads about INFJs and ESFPs - seems like a common relationship pairing. They are kind of related to ENFPs but do relate better to other sensors. I think INFJs are kind of more boring for them. I know my ISFJ mother tends to draw ESFPs to herself quite a bit, in fact I think that this is the most common type of friendship for her.