Perhaps. I'm also in a relationship with an INTJ so I'm not afraid of delving into the land of Ni-Te every now and then, he's helped develop/bring out that side of me.You're a 6... I think it's fair to say that you can read deeper into things than most... especially being an sx/sp c:
On a side note, two of my best friends are also ESFPs and I would definitely not describe them as vulnerable to manipulation. Fuck, you gotta try your damn hardest just to get them to sit down in one place let alone attempt to control them.