Looked easy at first, but after some thinking I decided I should choose "Other", since all of the options are somehow true for me... if it's even possible
As I mentioned in my introduction just a day ago, I've identified as polyamorous for a few years now, and I really do not remember the exact moment when it started. It happened gradually.
I must have always had poly tendencies. There was this first romantic relationship, and at the same time I was starting a relationship with another guy. However, at the time I thought that was only my friend, but I sort of "kept him in reserve" in case that other person leaves me. And so it happened... that was a bad idea. I'll probably tell more about it in another thread.
That second person tried to make me jealous several times, but it didn't really work with me. I only thought: "it's ok as long as he likes me". But also I thought: "if I have a chance to start a new romantic relationship, but won't because I am in one already, what if I'm missing out on something great?" It might seem like I didn't love that person. In fact, I didn't, but at the time I honestly thought I did.
When that burdening relationship finally ended, I still hadn't recovered from it when I decided to find comfort in looking for new friends and love interests on OKC. At first I was eager to find the latter, then I realised I was already happy and stopped caring about whether I'm single or not.
After a while I met someone whom I now call my soulmate (although I haven't heard from him for a while and that's upsetting

). I had probably heard that relationships can be non-monogamous before and I might have ended up poly eventually anyway, but thanks to him it happened sooner. I easily adopted the lifestyle.
What I like about polyamory is that it can reduce the number of broken hearts. I mean, another person would not leave you just because they found someone they think is better, just like you wouldn't, provided there is still mutual interest. And if you fall in love with someone who has a partner already, you still have a chance to be with them.
Such a lifestyle wouldn't save me from what I fear - that the other person might stop loving me. But, after all, why would someone suddenly stop loving a person they've known for years? Well, unless they do something really awful...
One more reason is that I'm bisexual (or at least bi-curious) and I'd like to have a relationship with a girl, too, without having to end the previous one(s).
It's not really easy for me to find a partner who would accept my terms as most people are still monogamous, but I can't imagine my life otherwise.