Is it wrong to be numb to certain people's problems?

I think it's completely normal to be numb to certain problems just because you don't want to get hurt again. It's like a protective wall to keep you away from the things that aren't going to be good for you. I am like that too especially with people I knew, and the more you know a person, the more you can see if you want to be close to that person or not. To know he has a drinking problem and also talks falsely about you, is even harder to want to have any kind of relationship with that person. You sound like a really honest and good person. I'm sure a lot of people would be just as you are. Sometimes life throws you obstacles, that you don't know how to be or what to say. In a situation where you were abused before emotionally or any kind of way, to be numb is to be aware of that pain and not want to befriend it. Others are stronger and don't let it get to them either way. Life is harsh sometimes and you don't want to have feelings or you want to have many feelings or you're just neutral but you also want to hide them.