Me '36F' and he '40m' - poly, open relationship - Love?

I am F and the person is M - but we are both pansexual and open. We both sleep with other people. We're 'open' - he has a long term partner and I am able to have other relationships.

I am *very* comfortable in my 2nd place in the hierarchy.

I recently saw him and he went out to get coffee. I am sure he kissed me and told me he loves me. I was asleep but the memory feels really real?

I'm not sure how I fee about the L word being thrown around when he already has a primary parner? I dunno if I say it back?