and a belated welcome to Neopoet.
I like this poem of your's very much. It is difficult to write of love in a poem and not sound trite and sentimental, and while your poem here and there does have a wee bit too much sentimentality for my taste, Its atmosphere and wording make up for this.
Here are the things about your poem that I feel need some improvement, imo.

First, the use of the word "love" should always be avoided in a love poem, wherever possible. It is true that sometimes the word is unavoidable, but to me the trick is to give an intense feeling of your love for another by illustrating what you feel without explicitly naming what it is, if that makes any sense. For this poem, using 'love' in the first line is important, because it sets the tone and describes the emotion, but I think that perhaps you should consider removing 'love' from elsewhere in the poem, and replace it with actions and feelings that show your love for this other person without actually labelling it.

Also, I always try to avoid the word "like", in the context of comparison. To me its a cop-out word, a word that is used for reasons of ease and speed.

This stanza is...well, its almost haunting, to me, until the end, when I found myself plunged back into sorry reality, asking myself what "it" was;

"It's the cadence of the words you speak
on a Sunday done in gray rain
and you say to me
"You're beautiful".
It nestles itself in our warm sound."

Is it love?
Is it the cadence of the first line? I think it is love, but I could not decide.

I was thinking an edit along these lines might help:

"It's the cadence of the words you speak
on a Sunday done in gray rain;
when you say to me
"You're beautiful".
they ring within our warm sound."

I think that this keeps your meaning quite well, it denotes love better, I think, it flows better in terms of cadence, and it also gets rid of the word 'and', another word I don't like in poetry.
Of course, whatever edit you make, if you make one, should be your own, and not mine.

This really is a good poem, S.G., and I feel that with some further editing it could be a memorable one.

But didn't care much for the word darling used twice. It can be replaced by?