what do you mean Op, that she won't let you look after the child ?
if she is there, it's natural that she wants to look after him.
he is her child.
i'm sure she appreciates the child-care you gave when she was working, but that does not establish squatters rights to go on doing it.
you need to find more interests in your life.
they were there temporarily, for financial, practical reasons.
they were always going to move on asap.
for you it sounds more emotionally invested.
but they do not have to arrange their life around your emotional expectations or needs. i am being blunt.
these issues often pan out like this.
i wish you all the best.
Misaligned holes in flat pack garden furniture
To go through chemo therapy or choose not to?