It would be very odd for your parents not to understand why you wanna return to the U. S. I think you may be overthinking it. But you know your parents better than I do. Also, he works for the American government. So, if there is financial aid, it should take care of you in an American school. If it doesn’t, you can go to a community college in California to start to get your feet , get settled, and then move on. Good luck.
I think in this case you should defer to your significant other. he knows exactly what it’s like to live there and he chose Texas. I think the fact that you live in an affordable area in a state that allows you to go wherever you want is a freedom you’ll miss very quickly. That’s said, you may want to consider just going South. There are great parts of Mexico to live in very affordable, or even farther South to Costa Rica. If you have the money to travel, just do that for now. Really get to know the world and most importantly talked to locals when you go, don’t just view it as a tourist. and then maybe the two of you can find a place that meets both of your needs.