Well, all I have to say, and you don't have to listen to any of it if you don't want to, is that I've been divorced for 15 years and I never introduced anyone to my kids.
Sorry....
It's not that I haven't dated with my kids not knowing. But, if someone wasn't marriage material, my kids were oblivious. I am not being judgemental, but I never would have moved a man in because he was my boyfriend and I never would have expected my kids to respect him as and adult figure in the family.
That's just me.
I didn't want to deal with the drama or realities of my kids accepting someone esle moving into my home. My youngest will be 18 and out on his own in a year. Then, I have all the time in the world to do what I want.
I know many won't agree with me, but when my mother divorced my dad, there were guys left and right and she moved in with one that was a total loser. She eventually married him and then I bailed her out when she caught him cheating with someone else. I was at her rescue. She was never at mine. She even had told me, "You're just jealous because I have someone and you'll never like who it is".
I would have liked someone who was kind to her and respectful of the fact that her kids didn't really know him. He was not our dad no matter how much they tried to force it.
It is for these reasons that I have completely sheltered my kids from my love life or my interest in men. Had I found someone that I could see marrying, I would have married him. I wouldn't have moved him in and played house when kids already aren't sure about how tenuous or true or long lasting relationships can be.
My first responsibility was always to my children.
I knew that my adult needs really had nothing to do with them unless I had a relationship that was secure. By secure, I mean leading to marriage.
It just so happens that I have never found that and they have never been dragged through the "whoopsies" of ill-fated dates or men that could never fit in with US.
This is just my opinion and many may not agree with me.
Your daughter is at an age where she will likely not be accepting of your love or life choices and the more you push, the more she may push back.
Your son is going through health issues that are serious.
I can understand you needing support, but I also understand your kids needing you putting them first.
I have no regrets about putting my kids first. My marriage didn't work out. I've never been in a hurry to make another bad choice.
I'm not saying you've made a bad choice, but you need to break things down into doable doses. Your kids won't be with you much longer.
It's okay to think about how to heal things now, for your kids, and even foster a relationship that is separate with a man you care for.
Forcing any of this...I don't see a happy ending.
Just my opinion.