Given what saying you love them means to you, you're understandably wary, I think!
(I'm similarly wary. To me, a -real- "I love you" is far more intimate than sex, and as much of a commitment as a ceremony. I've only said it a few times myself.)
Congrats! Glad things are happy and good for you!
Pan Female, Hinge in a V between my mono (straight) husband, Monochrome and my poly (pan) partner, ThatGuyInBlack