Just read your post Georgie.
If u read any of my past posts you will see that we had a terrible time with my son who also became a ket addict and alcoholic at university. Us all the other drugs he took.
I can relate to sk much yoube said the constant being g told it’s my fault him being an aggressive and horrid person to live with. Plus all the other horrid issues we had to deal with
Today my son is 6 mnths clean I didnt think we wld ever get to this point there were times I was suicidal. We still have some problems but he is turning g his life around. So ease just hang in there take each day as it comes. Try and get out the house see friends loved ones ,busy yourself etc until he gets to university. his behaviours and what he says is the crazy mind of an addict and so dont take it personally. Ignore his girlfriend if its anything like my sons ex girlfriend she is probably in it as much as he is and choosing to beleive what she likes. You know the truth and that’s all that matters. You are an amazing mum just hold in in there ….if my sons situation can change I beleive anyone can do it.