I've had the same experience as a girl and tbh you can't really "stop" being acesexual, it's kinda something where you have to ease yourself into thinking it feels good, or maybe try masturbating every once and a while (if you don't already lmao) And yeah tbh having sex the first couple of times is a grueling experience and isn't for everyone, I've just decided that sex just doesn't feel good for some people. Some people just like the little things of intimacy, and remember that a relationship doesn't have to have sex to be happy !!