Seeking Advice as a New Muslimah in a Delicate Situation

As-salamu alaykum everyone, I'm reaching out for some gentle guidance, insha'Allah. Though I haven't formally taken my Shahada yet, I've been trying to practice what I've learned and grow in my faith each day-alhamdulillah, I truly feel Allah is guiding me. Here's where it gets tricky: I've been close with a Muslim brother who, by many measures, practices his deen well-he prays regularly, avoids haram foods, and treats me with great respect. He's incredibly kind and has helped me out financially when I needed it, even covering some personal expenses. He often speaks about wanting to build a family together and dreams of us relocating to his home country to start our lives. Importantly, he never pushed me toward Islam; I found it on my own. I grew up in a different faith background, but wasn't really practicing lately. Despite our connection, things are kind of undefined. We're exclusive, but he hasn't officially proposed marriage or anything. We don't really go out much due to our conflicting schedules. Lately, I've stopped visiting him just to casually hang out or play games, because as I learn more about modesty and Islamic boundaries, it doesn't feel right anymore. My big worry is: once I take my Shahada, what happens next? Would I have to cut off contact with him completely? What does this mean for whatever we have?