I know it's too late now but you may want to be more discreet about your income in the future. Your bf's aunt has no business knowing about your disability. But in the meantime, disregard what she said and know that it comes from ignorance and hate.
Don't let her have that power over you. Generally, people don't get disability over nothing so your situation must be severe enough to warrant it. If the state found you worthy of the payments, then you must be. (I know you're not lying about it) So don't let her make you feel bad.

I just spoke with him. According to him my mood is always the same. I always have something to complain about. I'm turning into my mother I suppose. God, I'm glad I have therapy tomorrow.

Glad you have therapy; maybe your therapist is the one to rely on right now and not your BF. If he's BP he may be carrying his own load of issues and may have a tough time dealing with yours as well.

Good luck & go easy on yourself.

I like to take extreme positions with myself to help me find some balance. The first would be: everything is my fault I'll never learn to get along and be happy I should just go live in a cave. The second would be: I'm such a gentle and loving person how could people treat me this way I'll just go sit in a corner and be depressed. And that helps me out. Now there are tings you can do but with your BF around it's likely his auntie will know your business. Of course it's not her concern and I'm reminded of a line from The Golden Girls, Who are you to judge me? Between auntie and BF it would be a wonder if you weren't depressed so deal with the depression the best you can. This isn't your fault so it's up to you to evaluate this relationship and why many relationships including BP ones don't make it.

i'm so sorry you are going through this right now, i hope your therapist can help you