Is AUTHOR wrong in the post ? POST : We are all in our early 20s if that information is helpful. I am sorry it’s so long, I tried to edit down. Backstory first:

I have two friends that live together, one of whom needs a green card to continue living here; my understanding with the situation is that her work visa runs out in March, and to avoid immediate deportation she either needs to be in a new job that will sponsor her (would take too long/be difficult for her field of work/not a permanent solution) or be married and starting the paperwork process of getting a green card. The process of actually applying for citizenship is apparently a long, very expensive process with a low success rate, so that’s out of the question for her. I’m not gonna argue with people in the comments as I honestly do not have more knowledge on the subject.

Her roommate, we’ll call her D, agreed to marry her, probably back in April 2018. They already live together, D is a very socially-dependent person and very attached to her, my friend seems to be the only one who can balance out D’s personality, and they’re both low-key gay for each other though they won’t admit it. It’s perfect.

Except D has abandonment issues that present in the form of commitment anxiety, and she’s also afraid her parents will absolutely lose it if she marries her friend. She doesn’t want to be disowned. So she still hasn’t told them she’s marrying this friend. She tried bringing it up to her parents once, that this friend either needed to marry her or me, and her mother said something like “well I guess she’s marrying \[TheAllMightiest\], then.”

So D keeps not telling her parents. And she’s been not telling her parents for months and months, and time’s running out. It’s making my friend and I nervous, especially my friend. In September, worried that D would back out and this friend would get deported, I told her I would marry her if D backed out. I genuinely don’t want her to get deported, platonic marriage is a huge life goal for me, and I don’t have to worry about my family’s opinion. And at that point, I had no other major life plans in the works. I was content with the idea of platonic-marrying her.

Fast-forward to now. My friend only has about a month left before she needs to be hitched to someone. D still hasn’t told her parents, throws a fit about how she “can’t deal with this stress right now” every time my friend and I try to get her to either tell her parents or just back the hell out fully. I’m worried she will continue procrastinating until the last minute, have a breakdown over it, and then back out entirely.

Meanwhile, in the last several months, I’ve really hit it off with someone. We were already friends, but we’ve been talking more and more, discovering we have the same life goals, and we really enjoy each other’s company. What started off as joking about platonic marriage has turned into actual, genuine “we could do this???? oh my god????” I am in love with the idea of platonic marrying this person, getting a house with them, fostering children with them. They are reciprocal in their excitement. They keep bringing it up. It's obviously not a done deal as marriage is a huge commitment, but I want the opportunity to have that life with them.

But now I might be expected to green-card marry my friend.

If D backs out, AITA for going back on my word and not green-card marrying my friend? I'm asking the internet because I already feel like a huge A-hole just thinking about telling her and I want other's opinions.