Sometimes more translations help.
New International Version
So I will very gladly spend for you everything I have and expend myself as well. If I love you more, will you love me less?
New Living Translation
I will gladly spend myself and all I have for you, even though it seems that the more I love you, the less you love me.
English Standard Version
I will most gladly spend and be spent for your souls. If I love you more, am I to be loved less?
Berean Study Bible
And for the sake of your souls, I will most gladly spend my money and myself. If I love you more, will you love me less?
Berean Literal Bible
Now I will spend most gladly, and will be utterly spent, for your souls. If loving you more abundantly, am I loved less?
New American Standard Bible
I will most gladly spend and be expended for your souls. If I love you more, am I to be loved less?
King James Bible
And I will very gladly spend and be spent for you; though the more abundantly I love you, the less I be loved.
Holman Christian Standard Bible
I will most gladly spend and be spent for you. If I love you more, am I to be loved less?
International Standard Version
I will be very glad to spend my money and myself for you. Do you love me less because I love you so much?
NET Bible
Now I will most gladly spend and be spent for your lives! If I love you more, am I to be loved less?
Aramaic Bible in Plain English
But I cheerfully also shall spend and I would even give up my person for the sake of your souls, even though, the more I love you, the less you love me.
GOD'S WORD® Translation
I will be very glad to spend whatever I have. I'll even give myself for you. Do you love me less because I love you so much?
New American Standard 1977
And I will most gladly spend and be expended for your souls. If I love you the more, am I to be loved the less?
Jubilee Bible 2000
And I will very gladly spend and be utterly spent for your souls though the more abundantly I love you, the less I am loved.
King James 2000 Bible
And I will very gladly spend and be spent for you, though the more abundantly I love you, the less I am loved.
American King James Version
And I will very gladly spend and be spent for you; though the more abundantly I love you, the less I be loved.
American Standard Version
And I will most gladly spend and be spent for your souls. If I love you more abundantly, am I loved the less?
Douay-Rheims Bible
But I most gladly will spend and be spent myself for your souls; although loving you more, I be loved less.
Darby Bible Translation
Now *I* shall most gladly spend and be utterly spent for your souls, if even in abundantly loving you I should be less loved.
English Revised Version
And I will most gladly spend and be spent for your souls. If I love you more abundantly, am I loved the less?
Webster's Bible Translation
And I will very gladly spend and be spent for you; though the more abundantly I love you, the less I am loved.
Weymouth New Testament
And as for me, most gladly will I spend all I have and be utterly spent for your salvation.
World English Bible
I will most gladly spend and be spent for your souls. If I love you more abundantly, am I loved the less?
Young's Literal Translation
and I most gladly will spend and be entirely spent for your souls, even if, more abundantly loving you, less I am loved.
In this case... the YLT, NLT, WBT, and Aramaic Bible seem to be the closest to the original.