I agree with the other members. You are being abused and emotionally blackmailed. You are being manipulated. To which (a) I don't think you signed up for and (b) is no way to live - in any type of relationship.

If you want to stay in / salvage the relationship, it is really important to set boundaries. Starting today. Now.

- Call that person out on the behavior and let them know that it is not acceptable - anymore and that you have sincerely apologized. And time to move along.
- Either they accept that or they don't. (you've done your best!)

And then, you will be able to make a decision whether or not you wish to continue to be emotionally abused.

Best wishes to you. Please keep us posted on how you are doing.