That's quite a bit of a drip feed @Charlotte778
I'm.not going to comment on the relationship with your eldest child, but focus more on the marriage
He has made his feelings on marriage very clear. He is telling you very bluntly by his words and actions he doesnt want to be married. You can't force anyone into marriage. There is no magic words that will change his mind.
I'm.sorry to be blunt, but you have only 2 options
...1 Accept that's the situation and continue living as you are.
....2. Leave and find someone who will marry you and will meet your romantic expectations of owning a house and living as husband and wife.
If you feel you are covered financially and are not naive, then that's fine.
I think we are trying to open your eyes to the fact that everything is fine, until it isn't.
Relationships do break up.
.....Dont be one of those women who thinks he will never leave you or he if does he will help you financially. . Because he won't. There is no such thing as 'common law husband and wife'
...Dont be one of those women in 5, 10, 20 years time who come back onto mumsnet upset and devasted because he's fucked off with some new woman, has kicked you out the house, homeless, no savings, no pension.
Your old romantic feelings will.mean diddly squat if that happens.