D.L.
I have an 11 year old son too. It is such a great age they are still so innocent and yet they are growing into young men and the hormones are starting to rev up. My husband and I went througha separation for about one year. We were able to reconcile and now things are great. As f or my son during the separation he first thought it was cool that he had two homes. As time went by he became sad more often and during these times he was more likely to be disobedient and test the boundaries. I agree with the advice that suggests that he is feeling insecure.
Since your divorce is recent it is so important for you to provide him with as much security as possible. Most children believe that they are the cause of divorce even if you tell them they are not. Now he also feels that he is not enough for you. Little boys adore their moms and they feel like they have to take the role of "the man of the house" when divorce or separation happens. When you date they do believe you are going to replace them in a way. I believe it is very important for you to define your family and make sure you have time that is for your family only. It is highly recommended that you do not introduce your children to your boyfriend untill you know that this relationship will most likley end up in a marriage commitment. By keeping them seperate you have time out with your friends and he does not feel threatened. Your son will already have many issues due to the divorce you do not want to add to it by introducing a boyfriend that may not be the net "one". Now that your marriage is over your son should be your number one concern. I recommend that you read book on how to keep the damage of divorce downn to a minimum. I hope all goes well. Enjoy every moment with your son before you know it he will be moving out on his own,