Tips for waiting until marriage when you haven’t before?

I went through a bad relationship that sex was a big part of and then I conditioned myself to thinking that sex is a normal part of a dating relationship which is not biblical. Since re-dedicating my life to Jesus and pursuing Him fully, I think about dating a lot and how to set up healthy boundaries so that that line is not crossed again.

I also think about if I date/marry a virgin and feel like once I get married I’ll have bad sex. Has anyone else dealt with this?

And yes, of course, my spouse has to love Jesus too.