@wholefrost
Sorry you are going through such a bad time.
Have you sat opposite each other at a table and spoke face to face and asked for partner to bear with you whilst making changes to your lifestyle?
I say across a table as I took my hubby to counselling etc and it was the first thing counsellor told us to do. Not to argue or talk standing up, not to sit on comfy chairs etc.
To talksat opposite each other at a table takes the heat out and formalises and helps discussions.
You never see board directors of companies making decisions or discussing on sofas ir standing up.. Always at a table...
It worked for us... It really helped the talking.
At one point we had no floor downstairs so I got a coffee table lugged up stairs and we did sit on the floor at it in our bedroom.
Ground rules are that no one walks away from the table or moves from the sat position without the other persons agreement.. Not even to the toilet...or coffee...
Obviously we don't know the reasons for relationship ending but it is a huge turmoil to go through.
It is important that through this you do prove that you can look after yourself...and improve things that have brought relationship to end...
You do need to take control of your diabetes as this will help when your levels are lower etc. So having relationship trouble is actually a reason to take control of T1 as it is also proof that you can change!!!