Advice on Intersystem Relationships?

Does anyone have thoughts*/advice on intersystem relationships? I know we have one romantic(?) one already but I've never been involved besides maybe casually shipping a couple people. But an alter has been flirting with me and I've been kinda wanting to flirt back, and we both agree that a relationship not only would be healthy and healing, but would be something we'd be willing to try, especially since we seem to bring out the best or happiest in each other. I've watched and read lots about relationships and healthy communication and boundaries and stuff, but beyond mild flirting that I don't know how to respond to, I've never actually been *in* a relationship and don't know if it would be different than an out-of-sys relationship. I'm also just generally nervous because I've never been in a relationship before. Thank you for anything! *If your thoughts are that it shouldn't happen, it's creepy, gross, weird, whatever, I kindly direct you to the back button and the scroll feature. Please use it to back out of and scroll away from content you don't wish to see. Thank you. /gen