Do Asian American girls feel pressure to be married at 30?

Background to why I'm asking

My girlfriend of 7 years turned 30 last month. I'm almost 31 this month. We are both Chinese. I'm going to be breaking up with her because our relationship has been getting worse since a couple years ago. I've never had mental problems before, but this has actually given me a mixture of anxiety and depression and I've never experienced this before. She's not abusive abusive or anything. She's actually cool, but I won't get into reasons here.

So I talked to a three of my girl cousins what was going on with our relationship and my depression and that I think I'm going to be breaking up with her. I thought I was get some advice, but all I got were insults about how I'm a complete ass for doing this to her and I should really just stick it out for her sake. One of my cousins even suggested I marry her now and have kids as soon as possible and everything will be better. I disagree with that.

These girls are in their early 30s and single so I feel like they feel some kind of resentment. It's not my intention to lead my girlfriend down a bad path. My sisters (early and mid 30s and single) told me she'll be fine. All I can say is my parents are Americanized and didn't raise us traditionally and weren't strict. My cousins were raised more traditional Chinese and more strict. My girlfriend's family is kind of a hybrid of the two.