If your emotional energy suddenly seems to disappear, try to ask yourself WHAT is draining you energy (not WHO). If you think it is a person, it is merely a projection of yourself. If you for example happen to be envious to somebody, the person in question is not really important. The important dimension is your minds “shadow”side, that makes the projection. In fact, that person is your teacher (this is not easy to admit :-)).
The more you focus on the other person or persons, the tougher the “teacher” gets. The point is to get the new insight that is offered to you, not to be angry at the teacher. The main thing is to find the root cause for your energy drop. It is never another person, even though it feels so in the critical moment. I know, all this is easier said than done :-)). But true.
If we make the mistake and believe that some particular person is the cause to our weakness, we surround ourselves with fear and guilt, and our accountability towards ourselves disappears.
Instead we need to focus on our own energycenter, and find the leverage for new energy from inside and not let the outside affect us that much. Focusing on the teaching, not the teacher, gives us the insight that wisdom is quite often offered to us through challengies. That makes us more thankful even during harder times. And thankfulness brings us peace and harmony.