@TBoneTX and @mam521 thank you both for your replies and words of wisdom. You are absolutely right that I need to set clearer boundaries. I'm an adult, I live on my own, and I need to make my own decisions. I guess this is just part of growing up into being an adult.
I've decided to leave my current church for another due to repeated instances of spiritual control - not just one situation, but a pattern of people claiming to know what's "best" for me. They've said they want a say in my relationships and that I shouldn't marry a non-believer and that I am going against what God wants. They had a two hour session under false pretenses where they basically called out my decisions, and tried to pressure me into making a decision.
I've known my fiancee for four years. We've shared a lot of wonderful times together. Conflicts do arise, which some say is a red flag, and maybe we aren't the best at handling conflicts, but they tend to resolve quickly and our relationship grows from them. My Chinese is decent - not fluent, but conversational - and she's also learning English. When either of us hits a vocabulary wall, we use a translation app. I wonder how common this is? I imagine it might be pretty common. We don't get to spend much time in person yet, but we talk and video call every day. She waits for me to wake up in the morning and messages me first thing when she wakes up. It might be more communication than some couples prefer, but for us, given the distance, it feels just right and I really love talking to her - she is super sweet.
My parents and others who advise me that are close to me in my life are mainly trying to minimize risk it seems and to protect me out of fear, but they tend to focus on the negatives. I might also have rose-colored glasses, but I think that is fine as long as I sometimes take a step back and consider reality. After reflecting on this and the whole situation, I have realized that I am willing to accept that risk and take a leap of faith, trusting that I'm capable of working through whatever challenges arise. I don't want to give up on the woman I love because of outside pressure. If I walked away now, I know I'd live with the question "What if?" for the rest of my life - and that's a regret I'm not willing to carry.
I have told my mom about my engagement, my mom knows and disapproves, but I haven't told my dad because I really do not want to have this conversation with him because I know he will disapprove. I really need to work this problem out next.