I pretended to be friends with someone because her was like the devil.

It sounds like the situation you're in is quite challenging. Sometimes we have to deal with people who are difficult or can be considered "devils" in our personal context. If you feel uncomfortable, it's important to take care of yourself and set boundaries. Here's what you can do:

1. **Be Honest with Yourself**: Ask yourself why you're pretending to be friends. Is it for your own benefit or to avoid conflict?

2. **Set Boundaries**: If the situation is making you uncomfortable, try to set boundaries in the relationship. 

3. **Seek Support**: Talk to friends or people you trust about the situation. Sometimes, an outsider's perspective can provide a different perspective.

4. **Be Professional**: If the situation involves work or formal matters, try to be professional even if you feel otherwise.

5. **Distance If Necessary**: If the relationship is detrimental to your mental and emotional well-being, there's no harm in taking steps to distance yourself.

 Whatever the situation, it's important to take care of your own well-being. If you'd like to talk more about this, I'm here to help!

So, you pretend to be friends with someone because you feel like they are "the devil." This suggests that you may be in a difficult and uncomfortable situation. To better understand, let's explore some of the possibilities:

- Fear: You may be afraid to confront this person directly, perhaps because they have power or influence over you. Pretending to be friends may be a strategy to avoid conflict or danger.

- Strategy: You may use this strategy to gather information, monitor their actions, or find an opportunity to escape an unpleasant situation.

- Need: There may be a need to maintain this relationship, even if it is uncomfortable. This may be for work, family, or other reasons.

- Trauma: Past experiences may have caused you to react this way. Perhaps you have experienced betrayal or manipulation from someone who seems friendly on the surface.

- Lack of Choice: You may feel that you have no other choice but to pretend to be friends with this person.

To give you more specific advice, I need more information. Who is this person? What makes you feel like they are "the devil"?  Are there any threats or dangers involved? Sharing more details will help me understand your situation better and provide appropriate advice. Remember, you are not alone and there are people ready to help.