Welcome to the forum, glad to have you on board! I think it's important to know that although we are spending the rest of our lives with our spouse, that doesn't necessarily mean that they are the best person to talk about everything with. While there are plenty of spouses supportive of mental health, some are not, and that's okay - as long as you have someone to talk to about your mental health, that's the important thing!
I understand what you mean about the South Asian cultural taboo over mental health issues - it's not as well understood or accepted, and that can be hard to come home to. Just like there are certain spaces that we can or can't talk about certain things, perhaps family is not a place you can speak about this. But there are places you can - that could be here, or with a friend etc. I know it would be ideal to be able to talk about mental health with anyone, anywhere (and talking about it is part of how we do that!), we also have to work with our situation. If you haven't already, I would go and see a GP - they can provide professional support through medication and counselling. You're not alone in thisx
Much love <3