<human>: A few months ago, my partner of 18 months acquired a medical marijuana card and started taking edibles on a regular basis, I want to say 3-4 times a week for fun, to combat insomnia, and when stressed.  We experienced some conflict, mostly when I expressed that I didn't like it and she felt like I was being insensitive about what she saw as a potential drug problem.

Fast forward through a few months of traveling, sometimes together, sometimes not, and she winds up in Amsterdam while I am getting ready to fly home from elsewhere.  She says she has been in pain this whole time due to back and other physical issues, in addition to being very stressed out and getting sick, and wants to continue to use weed to help with these things after she gets back.  Because she has been without it so long, she feels certain that she isn't chemically dependent on it.  I say sure, but I don't want to IM while she is high, she gets upset, we agree not to talk about it until we're home.

My dad got high on a near-daily basis when I was growing up, and I think as a result I find it excruciating to be around people who are stoned.  He was an excellent father in all other respects, but my mom wanted someone sober to talk to, and I think I would too.

We are relatively serious and talking about moving in together pretty soon.  I don't know when or how to say that we probably won't stay together if she feels that she needs to get high on a regular basis.  I believe she is self-medicating as an alternative to antidepressants, opiate painkillers, etc., so I'm extremely reluctant to make it out to be an ultimatum.  Should I say something now or wait until she's made up her mind?

Can you summarize the given text in a few sentences?
<bot>: She might need weed to keep her sane, I don't know if or how to say this might be a deal breaker for me.