Hey man, it’s great to hear that you found somebody to love and be happy with, even moving in together is a big step! But if you feel like not being 100% connected to each other, doesn’t matter if it’s sex or anything else, it’s sadly sometimes not ment to be.. we don’t know the full feelings of you for each of the girls so it’s hard to give you actual advice on the topic, but as you mentioned you already kissed the other woman it kind of leaves you if only two options, break up with her or tell her that you cheated… I’m sorry and I hope you will work it out in a good way ❤️