<human>: My boyfriend and I have been dating for just over 3 years. Everything is wonderful aside from the occasional argument about his farts smelling too bad or me leaving my bras hanging in the bathroom to dry. We're planning to get married next year. We've had all the talks about kids, and future plans. So, we're on the same path and things are great.

In California a new law just passed requiring all parents to vaccinate their children regardless of personal or religious beliefs. I was talking to my boyfriend about it kind of in passing, and he said he doesn't know if he's vaccinated. I wrote it off to him just not paying attention to things like that (his mother was really young when she had him, and she didn't have a lot of his paperwork - birth certificate, ss card, etc). But I pressed him to find out, and turns out he wasn't vaccinated as his mom thought the shots were unnecessary - she was young, English wasn't her first language, so she didn't know any better. 

I was adamant that he talk to a doctor to see what shots he needed, if any. He said ok. The next day he comes to me and says he doesn't think he should get vaccinated. He was talking to his best friend whose brother has autism, and his family believes it was because of the vaccinations. I know his bestfriend and love him and hang out with him almost every week. Never have I ever heard this is what he thought, and I was completely floored. 

Now I'm not going to get into a debate here about what is right/wrong but my future children will be vaccinated, unless some new information comes to light before then. My boyfriend and I are still debating this - **He doesn't want to get the shots because he feels like he's betraying his best friend, a reasoning I don't understand. And I feel like by not getting them he's putting himself at risk, and potentially our children if we ever have them.**

And now I'm wondering what else we need to talk about before we get married. I never thought vaccinations would be an issue, so what else could potentially be so divisive for us.

Can you condense the text into three sentences or less?
<bot>: Just found out my boyfriend isn't and won't get vaccinated. Wondering what other potentially game-changing topics need to be addressed before we get married.