Question regarding marriage

28M here and recently became a believer and I really love Jesus Christ. I love going to my church. But closer I come to God, more incompatible and distant I become from my girlfriend who is a nonbeliever and buddhist. Before I was a Buddhist but I always knew something was off. Back then, my relationship with my partner was not a problem and we have been dating for 6 years. Now, every time I talk about Christianity, she doesn’t like it.
What should I do? I can’t just leave her because she is not in financially good situation and I try help her and we love each other. But our future goals and values are drifting away from each other..

Anyone who experienced something similar? I pray for my girlfriend a lot. But, her whole life revolved around buddhism. I need some guidance from people who married successfully or people who had similar experience like me. Thank you!