I like what Indy and Res and Questing Poet said. I also think Billy is correct.
Keep in mind that if you want to go out more, put yourself out there and stress yourself a little bit. Extroverts aren't going to understand that you withdraw to rest. They may assume that you don't want to participate.
Also, it is very important for an INFJ to learn to ask other people out. INFJ News flash: What you expect people to do is only correct if they are aware of how you feel. Regardless of type, if you are shy, lack of asking other people will drive them away eventually.
Be greedy. Home in on a few people you like and ask THEM. Like Indigo and Questing Poet said, unless they are unusually strong Fes, they aren't going to be thinking about you as much as you will be aware of them at all times in the "should could" sense. Other types can be just as connected but with different emphasis, so try not to judge. You have to step into their sphere of consciousness by including them in yours with clear signals. And by clear, I don't mean INFJ/P external ones, I mean the kind you use with yourself in your own demanding head. If you are INFP leaning, you might appear too detached (I know you aren't). If you are INFJ leaning, make it clear that you are accepting of them (I know you are).
As for the original question, tell your boss's wife that it is OK that she double dipped her potato chip (crisps) into the Guacamole dip, give her a light touch and tell her a joke.
Sincerely,
Abby