I feel for you, I was once in about the same situation. Is it possible for you to keep your furbabies in just your room? I know it would cut down on there space to roam and probably be very cramped , but maybe an option? I know many cats that will walk on a leash so you could provide them with exercise.

Hurting yourself in front of them really isn't going to help matters and killing yourself certainly isn't an answer to any of this, but you know that of course and that's the stress and panic talking.

I only bring up the T issue because maybe that would be of help in your case of keeping your cats with you... T's understand that animals are most often the source of unconditional love. Maybe its possible for your T to help explain to your parents why the cats are a good healthy part of your life.

I hope things improve and some kind of arrangement can be made