Vocal anti-gay marriage new coworker

I work in a kind of conservative environment. I love my job and I'm comfortable around most of my coworkers, though I would never, ever come out to most of them. Usually it isn't an issue. I know that most of them are opposed to homosexual ~things, but whenever it gets brought up, it's usually in vague philosophical terms and I can leave the conversation if I want. I've accepted that they're my coworkers more than my friends.

However, I now have a new coworker who is a bit more vocal about her views, kind of like a bulldozer. While she's more open to conversation than your standard homophobe, she's very convinced she's right. She all but said to me the other day that being Protestant made no sense because the Catholic Church is the one true church and that my decision to leave the catholic church instead of trying to improve it wasn't a good decision. :rolle: Things like that, I can usually just mentally roll my eyes at, but the other day she also said in regards to gay marriages, "they can call it marriage but it isn't really marriage" which made me feel angry and disrespected. When I think about her, I just feel angry. :tantrum: Deep down, I know that she's probably a good person who doesn't mean to offend me and basically tell me that my current and future relationships are invalid, but I just feel so frustrated. She's perfectly in her rights to say and feel anyway she wants, just as I am, but I don't know how to develop a positive relationship with her without considering her a cruel person.