Just wanted to add my welcome to our forum.
There's a lot to learn about polyamory, so I recommend taking advantage of Polyamory.com and reading the various threads, asking any questions you may have, expressing your thoughts, concerns, etc.
Poly is relatively new in our world, often poorly understood, and not for everyone. I feel bad that your 5-year relationship ended, but it may be for the best. You now have the opportunity to meet lots of people here, and there are other resources out there. Keep exploring.
Glad you could join us.
Love means never having to say, "Put down that meat cleaver!"