system
Given the following post, respond as if you're commenting on Reddit:
human
Seriously considering leaving my PhD program - advice?

I am 4 years through a 6 year PhD program in Biology from a big name school. I'm an international student on an F1 visa, so I moved to the US specifically to complete this program.

Four years down and I am desperate to leave. My physical and mental health have both suffered due to the stress of the program and also a difficult relationship with my advisor, and my productivity has slowed to a halt. At my current rate of data generation, I'm afraid that I won't have enough to satisfy my committee and graduate two years from now. I'm not enjoying the project, and the thought of switching to a new project with the same advisor makes me feel depressed and anxious. The rest of my lab is wonderful - I would be really sad to stop working with my colleagues, but I have worked very very hard on trying to find a synergistic relationship with my advisor, and frankly I've lost my trust in this person. I'm very resentful of many past events and the style in which my advisor chooses to "advise", which is very controlling and critical.

I've learnt that I want to work in science but the kinds of jobs I want are typically advertised at the Masters level. I want something 9-5-ish, field is flexible. I am very motivated by feeling useful and by working in close collaboration with other scientists (I think part of the struggle I've had with PhD is that I don't enjoy the solitude of being solely responsible for completion of my project). I'm happy to work overtime occasionally but I want to have evenings and weekends to myself, for the most part. 

So! If I left, I would have a Masters in Biology from a big name school, and plenty of experience (4 years from PhD work + 4 years research experience prior to this). I am confident that I could have a fulfilling career without a PhD. My major issue is that I don't want to leave the city where I'm currently in school! It feels like home now. But I'm dependent on my student visa. I would be able to apply for OPT extension of my visa after graduating with a Masters, I believe, but this extension lasts at most two and a half years. I believe my only other options are:
-H1B visa, of which there are a limited number available per year.
-Green card by employment sponsorship, which AFAIK is typically only offered to employees who have been working at a company for a number of years.
-Green card by Diversity Visa Lottery, which of course is luck of the draw. I'm from a country that is eligible and has a relatively high rate of winners per number of entrants, though.
-Green card by marriage. My partner is a US citizen but marriage isn't on the table right now, and I don't think either of us really like the institution of marriage anyway. And of course marrying someone does not guarantee that a green card application will be approved.

I'm seeking advice from my department and career services at my school, but I would love advice from anyone who has the time and inclination to provide it. Thank you!

[edited a few things for clarity]
gpt
Don't stay in school just because you don't want to move. That's the wrong motivation.

If an M.S. is all you need or want, and you basically have it, then great! You're done! Move on with your life.

If you're close to the PhD and think you might need it (and don't want to move anyway) then why not put in a little extra effort and just get it?

No one here can make important life decisions for you, and you shouldn't let them. Just weigh up the costs and benefits. You know that cheesy old suggestion about making lists of pros and cons? It might be worth doing that. 

But honestly, it sounds like you want to take the MS and be done, but you just want validation. You feel like you're being a quitter and might be making a terrible mistake that you'll regret later, right? You want us to tell you that it'll be OK and you should just go for it, so you're not so nervous?