Of course, spirits do try to take people’s energy. However, only low-vibration spirits do this. These are the spirits you would call ‘evil’.
In your case, it appears these spirits induce just the kind of emotional energy they need in you before draining it out. It is possible that they are the ones that give you these thoughts in the first place just so you can get to the state in which you will furnish them with the energy they want.
I will now provide some details as to how this works.
How do spirits take people’s energy?
Firstly, you have to understand that these are low-vibration entities and so they have to feed on energy that resonates with them. That means they can only feed on low-vibration energy or emotions. Low vibration energy includes fear, anger, unreasonable regret, fiery jealousy, and other emotions you would term negative.
Normally, the spirit will be attracted to anyone having a moment of negative emotion such as anger, fear, jealousy, etc., to have a meal. But if you keep on giving off these emotions, the spirit will now see you as a host and get attached to your aura. It will then place negative thoughts in your mind to make you full of fear, anger, jealousy, regret, just so it can have its meal.
You will agree that there are times you will for no reason start feeling low and wonder where the depressive feelings are coming from. That is the spirit attempting to make you give it your energy.
What you should do
I cannot tell you to stop thinking about spirits or looking at pictures of deceased individuals. All I can tell you is to make sure you are in a positive state of mind as often as possible.
It is impossible for a spirit to take your positive energy since itself is negative. Furthermore, it is very difficult to make you transition from positive to negative emotions if your positive state of emotion is strong.
Source: Quora