Can you protect yourself from your own feelings?

Sometimes, I think, people will feel they are in danger of gaining too much attachment to a person or thing or activity they can not have. On the other end of the emotional spectrum, some people may be afraid that they have too much hatred for someone or something—a hatred that may impede their ability to have a decent life. So people try to not feel what they are afraid of feeling in order to protect themselves from the consequences of those feelings.

Do you believe it is even possible to protect yourself from your own feelings? Have you ever done it? What was the situation? How did you do it? Were you actually successful at protecting yourself?