Hello and welcome!
You actually probably have more in common with my boyfriend than myself - unfortunately he is not present on these forums.
Dude has lived with MrS and I for almost 3 years. MrS and I have been together for over 21 years total (married for almost 18). I'd say, for me, that it took probably 2 years for us to really adjust to the "new normal". We seem to have managed to skip over many of the "newly poly" issues that many polycules experience - which I attribute to the fact that the boys genuinely love each other (in a platonic, "hetero-life-mate", kind of way - they were best friends before poly came into play) and that none of us were truly monogamous in mindset to start with.
I'm hoping this forum gives me a place to post questions and concerns, and hear other peoples ideas.
That is what forums are for!
Read, share, learn and enjoy!