R.J.
#1 Cut yourself some slack.
#2 Of COURSE it's okay for you to be questioning whether or not you want to do this. You DH may well be a day late and a dollar short (or not), but just because he is FINALLY going to treatment doesn't mean that everything is magically fixed. In fact, early recovery (first 2 years) is often worse/harder than active addiction/drinking. A lot of well meaning people give spouses who leave (or separate) during early recovery a hard time (the whole "you should be supportive" BS... when the fact is *wreckage* -to use an AA term-, has been created over the past several years and the spouse is usually exhausted, on their very last nerve, or just too beat up emotionally and mentally to give any more energy to someone who has done nothing to help THEM for the past x amount of time. Staying with your DH is a gift, not a right, at this point. And it may well be one you're not willing to give, now or later. You may. You may not. YOU HAVE THE RIGHT NOT TO KNOW THE ANSWER.
#3 Take Care of Yourself. -borrowing another aa phrase-. Quite frankly, honey, figure out the plane ticket thing. And if you want to go home for a few weeks, or for the duration, do so. Most likely everyone is urging you to stay. If you really want to, do so. But they're rooting for the 2 of you, and doing what they think is best/ most helpful. That may or may not be the case. So take some serious time and consider what is best for you.
#4 Be gentle with yourself. You know what? Dora and Calliou aren't the worst things in the world. They probably make your kiddo laugh. And is there any better sound in the world? Especially when you want to cry? Yes, you may be over indulging in TV for awhile. Revel in the opportunity to be able to do so instead of beating yourself up over it. You 2 are going through a hard time. As an adult a girlfriend might bring you cookies or wine, or you might do a Haagen Das weekend when feeling low. You don't overindulge every day, but hard times... they're the time for some comfort. So take advantage of the fact that your child has a "treat" of some extra TV and giggles while the 2 of you are in a difficult place.
#5 Counseling. A good counselor is a highly educated, nonjudgmental, amazing friend, with stellar ideas and the BEST shoulder to cry on/ ear to bend, that you just didn't happen to meet on the street 10 years ago. It can take a bit of "shopping" (meaning a few appointments with a few different people) to find the right person, but boy howdy, do you DESERVE someone like that right now. Someone to completely unburden yourself on and kick ideas around with, and vent without fear of fallout/repercussion. If you find someone like that in San Jose, 1 will get you 10 that they can recommend someone in StPaul to check out. (Psychologists go to school all over the country, and then on top of that keep their hand in with others in the field via reading, conferences, networking, old jobs, etc. If they can't recommend an individual... they WILL be able to help you research). So whether you stay in CA or head home... you can find a counselor. Your DH has a whole TEAM of counselors right now, but he's HURT you in many many ways. Consider it (at the very least) part of the treatment expense.
#6 I'll bet you're exhausted and overwhelmed, not to mention hurt and having trust issues. Which makes the idea of spending the energy to go out and try and connect with new people a daunting and often futile proposition. So don't WORRY about it. Your toddler is not going to suffer not having "friends" for 6 weeks... and it's unlikely that you'll get past the "getting to know you" stage with other parents... so if you don't want to "get out and about"... DON'T. If you do, have at. But it's NOT a requirement that you go out and socialize in the middle of a traumatic event. Which is what is happening. If it makes you happy, do so. But *don't* do it out of any kind of guilt... much less mom-guilt. Heck. The play place at McDonalds anywhere in the country has random kids to play with for an hour with no strings attached. And toddlers need high-fat diets anyway. But there is NO need to do anything beyond what makes you happy.
#7 Great big giant hugs.