Ok, this is your issue. You can't put it on the other person. Admittedly the other person receiving these messages is possibly playing along too but it is up to you on your end to stop. Delete their phone number so that there is no quick way to message them. Also block their number so that they cannot get hold of you at all. Find some sort of reward for sticking to your plan each day. Talk to other safe people for support.
__________________
Pegasus
Got a quick question related to mental health or a treatment? Ask it here General Q&A Forum
“Everybody is a genius. But if you judge a fish by it's ability to climb a tree, it will live it's whole life believing that it is stupid.” - Albert Einstein