When you temporarily drain a person's energy, it may make them feel negative, but the energy will be renewed and it does not have much of an effect. Here, what energies you draw from his soul also plays an important role. Attracting the negative can cleanse him of negativity and make him happy. If you drain his happiness and life energy, he may feel negative.
It might be better for you to cast a curse and cause negative things in your life by using the hagalaz thurisaz runes. Also, do not absorb anyone's energy and take it into yourself. This is definitely harmful for you. Energy vampire is not the best solution