Waiting until marriage

So me and my boyfriend have been dating for 10 months, I’m 20 and he’s 19. We’re planning on getting married when we can afford it (not engaged yet and still live with my parents, both because we’re both broke right now), and we’re both Christians and trying to wait until marriage to have sex. It’s starting to get really hard to wait because my desires are getting stronger everyday and I know he’s having a hard time waiting anymore as well.. Any suggestions or advice?? I’d feel super guilty if we gave in but I also really want to know what it feels like.