So we've been together for about 2 years, live together for a bit over a year. I feel like we started to just co-exist. It's a little bit like it fizzled out but at the same time we feel good with each other most of the time.

I think I'm much more passionate, open for new experiences and spontaneous than he is. I like him the way he is, calm and understanding but I miss the passion. He is quite an introvert, same as me but I'll push myself to be as open as possible and meet as many people as I can.

I'm not sort of person to go out of my way to find another love interest but every now and then I'll attract someone that I happen to adore.

At the begging of our relationship I told him that I want to try polyamory and asked if he'd be okay with it. Also, I've explicitly said that I don't want to commit to a monogamous relationship. He was completely open and said that it's not a problem for him but he will likely be interested in dating only me. And yes it did worry me but I've asked him to confirm that he is on the same page and understands what I want so many times. And he always said "sure, not a problem, I think I'll be completely fine with it".

About 6 months ago we reached quite a good point in our relationship (we both have a bit of a temper) and I said to him that I'm ready to date others now. This ended up in a huge argument with him saying that I'm treating him like a toy basically. So I tried to explain to him that's not how it works and assured that I still love him and didn't lose interest etc.

I've been dreading having this convo again but now that I've met someone that I have a crush on I just don't want to let it get away. Me and the new person are so similar when it comes to personality and kinks that it just pains me to even see them. I told my boyfriend all about this person and what we were talking about, that we are flirting and talking about sex and all that so he is aware. He knows that I won't do anything without his consent and it doesn't bother him. Didn't ask me to stop or anything, he said that i should enjoy being adored by the other person and that maybe now my self-esteem will be better. The new person is so damn hot and I admitted that to my boyfriend and he said that I should just take a win.

But I'd love to pursue that person so much. And they would like to try with me and this whole situation just sucks. I love my boyfriend and want to stay together but I want to be happy as well.

I wanted to vent a bit, I know that I need to have a serious talk with my boyfriend again. Do you guys have any advice on how to approach this? I won't make him consent but soon I'll have to pick my own happines rather than his which might mean leaving.

TL;DR My partner knew that I'm polyamorous before we got together but now he doesn't want to let me date others. Any advice on how to talk to him about it again would be great.