Why does divorcing a partner hurts?

1Co 13:1 I may be able to speak the languages of human beings and even of angels, but if I have no love, my speech is no more than a noisy gong or a clanging bell.

1Co 13:2 I may have the gift of inspired preaching; I may have all knowledge and understand all secrets; I may have all the faith needed to move mountains---but if I have no love, I am nothing.

1Co 13:3 I may give away everything I have, and even give up my body to be burned ---but if I have no love, this does me no good.

1Co 13:4 Love is patient and kind; it is not jealous or conceited or proud;

1Co 13:5 love is not ill-mannered or selfish or irritable; love does not keep a record of wrongs;

1Co 13:6 love is not happy with evil, but is happy with the truth.

1Co 13:7 Love never gives up; and its faith, hope, and patience never fail.

1Co 13:8 Love is eternal. There are inspired messages, but they are temporary; there are gifts of speaking in strange tongues, but they will cease; there is knowledge, but it will pass.

1Co 13:9 For our gifts of knowledge and of inspired messages are only partial;

1Co 13:10 but when what is perfect comes, then what is partial will disappear.

1Co 13:11 When I was a child, my speech, feelings, and thinking were all those of a child; now that I am an adult, I have no more use for childish ways.

1Co 13:12 What we see now is like a dim image in a mirror; then we shall see face-to-face. What I know now is only partial; then it will be complete---as complete as God's knowledge of me.

1Co 13:13 Meanwhile these three remain: faith, hope, and love; and the greatest of these is love.