Work on getting yourself out of that living situation. It’ll be a lot quicker than giving yourself diabetes to punish them.

Hiding your meds, unless the intention is to prevent you overdosing on them, is not OK. Do you have any family or friends you can ask to intervene with them? Your doctor, maybe?

Get out for a walk. Twenty minutes first thing every day will help, even if you don’t really want it to right now.