That is a tough question to answer.

I think that it's very normal for the feeling of love to wax and wane as time passes, and the relationship becomes challenged by life. Mental and physical health often affects sexual interest and libido. While your wife's comment/s understandably hurt your feelings and scared you, you could choose to look at the situation from the positive side. It is nice that she was honest with you, and told you the truth, rather than putting up a facade. (I've done the latter, and that hurts even more!)

You can use this opportunity to go to therapy together. Perhaps you need to get to know each other again. Lose a few pounds and do fun things together more often. Find a new thing to discover together, to spark up the interest again.

Whether or not you can let go of that pain, I don't know. Whether or not you & your wife will be willing to commit yourselves back into the relationship, I don't know. Those matters are in both yours and her hands.

My personal opinion: It is worth trying hard to save the marriage. Letting go is very painful ~ especially if you have children.

Very best wishes and hugs to you!