Try another church nearby. Visit other churches and see who else is a believer out there.
I just recently came across a bona fide SDA singles website called "Adventist Contact" (adventistcontact.com) who are hoping to build its membership. And it is completely free.
Due to churches being limited in attendance during the pandemic, I have been tuning in each Sabbath to other churches online via YouTube to listen to sermons by Pastor John Lomacang at Thompsonville SDA in Illinois and Pastor Glen O. Samuels, President of the West Jamaica Conference both on YouTube. But the only issue is, not being able to connect with anyone really.
Please be sure to check out Adventist Contact and share it with your single SDA relatives and friends.
All the best!