DP and I have been together 2.5 years, both have kids (9, 8 & 6) from previous marriages. I have my kids 100% of time as sole parent. We’re planning on moving in together later this year. My son, (9) initially positive about DP and his DS, has recently taken against them very strongly as he realised their significance to our lives. This is not uncommon & is understandable I know, albeit not easy to deal with. He protests with v regressed behaviour if they come around — screaming at times, talking in baby voice, ignoring DP’s son (8), in order to put him off. He may be autistic and is on wait list for assessment. DP started staying the night 1-2 nights per week on his own at ours recently. He held off for this long out of sensitivity to the kids but I pushed us to try it. DS reacts by coming into our room at 5am and shouting as he clearly doesn’t want DP in my bed.( My daughter is happier with the situation). DP has reacted by not staying overnight at mine anymore, not meeting up with us with his son and only seeing me on my own after my kids are asleep or if I have kids. Somehow he thinks it’ll still be fine to live together but not progress towards it in the meantime. He forgets to include me and my kids when his extended family have parties and I have pushed to progress things at every stage. I’m not sure what to do or how to see it. He emphasises he wants to be with me and live together but that we shouldn’t give ourselves extra stress at the moment with the way my son has been reacting.