D., I know exactly what you are going through. I had to go through the same but much worse with my husband's grown daughter. I, like you, tried to build a bridge between us all many times. I always reached out and it never seemed to do any good. Now with our situation, things would work out for awhile but then go haywire at no fault of ours. My husband and the rest of the family got tired of the rollercoaster ride so we just simply got off of it. Meaning, we have had to cut her out completely. I know that may seem extreme but if you knew the whole story, you would totally understand. I've been married for 7 years now and the first 6 years were hectic because of her. Let's put it this way, during those 6 years, we did not have 3 months straight of peace. It was drama all the time. If I wanted drama, I'd watch a soap opera. To make a long story short, we had to make a decision. Either to go on like we were and continue to subject everyone (including our 16 and 4 yr old dtrs) to this nonsense or to put a stop to it completely. We have stopped trying with her and stopped responding to her antics because that's exactly what she wanted. She thrives on drama. I have told her, like I told everyone else, I am not going to waste our time on those who do not want to be a part of this family. If you don't do your part, we are done with this one way street. We had to do this for our peace of mind and to relieve a lot of the stress. Like I said, I know this seems extreme but if you only knew all. Your stepson is an adult and it is time for him to stop living in the past. He will not get anywhere by doing that. He needs to let it go and if he can't, I wouldn't waste any more time. I know it's sad. We all want this perfect little family where everyone gets along the majority of the time, but if you don't have willing players on all sides, it won't work. Now let me state this, my husband was the one who decided to cut his daughter out. There is a long history between them and he got tired of the pain she was putting us all through. Enough was enough. I don't know if I helped or not but I hope so. You are not alone in this at all! If you ever need to talk to someone who has been through what you are going through, please don't hesitate to contact me. It is not your fault, you have done all that you can do. Do not question yourself. It took me a long time to realize that. Unfortunately, no matter how much we try we can not change them nor the situation. All we can do is concentrate on those who are truly being a part of the family. Good Luck and hang in there!