It is technically possible just advised against. Don't get married in a church unless you want to be walked all over. The thing is that I've had worse experiences with spiritual and SS women than non-religious women. But most of the reason for that is that it is hard to find other SS in general. Keep in mind for this post I'm straight and male though I doubt it matters
A couple years ago I actually made an account on twitter and a girl who was SS messaged me and we talked, exchanged faces and she called me cute. We talked about love and sex, and I swore I found her on another website making a post about trying to find a boyfriend online. Same username and age. She stopped responding I think and then I lost my computer or something, but I hit her up months later and asked if she remembered me but then she just blocked me. I was like, what the fuck? She posted about flirting with boys but I guess it was a one-way game for her, and she only wanted to tease me with something I'd never have. She must think that there's a billion more SS men out there waiting specifically for her...Well since then, I've been alone but nevertheless more open to the prospect of dating someone who is an atheist. I would just rather have someone cares about me than has everything in common with me, and if I simply cannot make people like me then so be it I will not be liked.
Well anyways the point is in all cases you need patience and to be careful anyways. Don't let anybody walk all over you and you should be able to gauge your needs and red flags from there. I think this is one of the hardest parts of Satanism