Falling out of love

How would you tell your partner you’re falling out of love? Would you say anything at all?

I’m just starting to not feel it anymore..I have to constantly beg him for affection, if I don’t ask him to talk to me we would barely communicate, he’s not romantic (which I feel I need atleast here and there to be happy).

I’ve told him before and all he says is I am free to leave whenever but never actually talks to me about it. So I’m not sure if he takes me serious.