Hello, and welcome aboard.
You'll find a lot of really useful information here. There's really no orthodoxy, just the knowledge you can love more than one person and the security and generosity to be okay with the person you love doing the same. There is a lot of terminology that's been invented to describe the situations and attitudes.
People here have as many stories as there are people. I share my fiancee's love with her girlfriend who is also a good friend of mine. Hope you have good experiences as well.