First, I want you to accept that energy is not fixed and always changes.
Energy is like water. It flows ceaselessly from here to there, from this person to that person. When we understand the properties of energy, which changes ceaselessly according to environment and circumstances, we get less stressed concerning change itself, even if it doesn't happen in the direction we desire.
Second, we can always change energy if we want and choose to. We cannot change the energy of other people as we desire. We can choose, though, how to respond to the energy of others.
When you feel that your energy level is lower because you have been influenced by negative energy from others or the outside environment, instead of remaining in that state, get away from it as quickly as you can. Changing energy states does not take a lot of time. With two or three deep breaths, one minute of meditation, one minute of exercise, or a smile, even, you can change your energy positively as much as you want.
What's important is that you must be awake. When you are in a negative energy state for whatever reason, quickly realize that, and, once you've realized it, change that energy state quickly through action instead of complaining or worrying about it. This is possible only if you are paying attention. It's not difficult. Like training muscles through exercise, you can continually increase your wakefulness and mindful action through practice.
Another approach is avoiding reacting to the stimuli of negative or nonproductive information or energy and ignoring it. Instead of reacting, I want you to fill your surroundings with positive energy by responding more proactively to positive and productive information or energy.
It is very important to ensure that the energy in your body is grounded by concentrating on the energy center in your lower abdomen. When you think you are easily swept away by the energies around you, I want you to do a lot of core-strengthening exercises, which can fortify your second chakra, to create a stronger energy center.
▷Yoga Class for Core Strength
▷Qigong Course for Core Strength
▷5 Yoga Poses Manage Your Fire Energy
▷One Simple Core-Building Posture