Killing someone you know in a dream is an act of aggression that you envision, but should NEVER act out. You may have been hurt by these individuals unintentionally or indirectly. No matter how much you hate a person in any kind of conflict, do not act upon dreams of hurting or killing them physically because it is not worth it.
Stop for a moment to think why you are dreaming of harmful dreams, or rather nightmares because a human life cannot be bought for any money or any material in this world; and simply irreplaceable.
Talk to them or ignore them all together and move on with your life. You are wasting energy hating someone, and dreaming of inflicting harm to them that causes you to lose sleep.
Dreaming of violence where people around you are getting hurt indicates that you feel threatened in the waking hours. If you manage to go unharmed while others are harmed, then you are responsible for the actions against them when the attack was originally aimed towards you.
Sometime a big challenge at work or in a relationship can take the form of violence in your dreams.
Dreaming of a baseball bat means you are lead on by your inspiration and main impetuses to win. Sometimes the baseball bat is wrongly used as a tool to hurt others. Be careful of how you handle the baseball bat in your dreams.
Also, the baseball bat might be a representation of a phallic image and have sexual implications. Again, see how your baseball bat dream develops.
Abandonment is not considered a good intention in most perspectives. Thus, to dream of yourself abandoning another person suggests that you are too submerged by stress and pressure and wish to shun away your obligations. You desire to escape reality and be free from your responsibilities. Just for these reasons alone, abandoning another person just for your own selfish reasons is not justifiable. Dreaming of abandoning someone may propose that the person has caused a great amount of pain and hurt. You feel it is the best to leave and not associate yourself with that person in order to save yourself.
By abandoning another person, you are instilling a feeling of betrayal and profound pain in them. You should really consider whether that is the best option for you and that person. Hastily making a decision without considering whether the benefits outweigh the negative of your relationship with the other person, will not be a wise decision. In the latter case where the person has deeply hurt you, the decision is totally up to you.
Leaving someone does not always have to be taken under a negative light. Dreaming of yourself abandoning someone may your desire to obtain your freedom again because the burdens that comes with being with that person is just too much. Also, leaving may be the best option for that person. Whatever is the case, think things through.