Minerva,
I echo the last post who asked that you find forgiveness. I too struggle with forgiveness towards a certain person who constantly sins against me without any apparent consequences.
However, like you said, this person doesn’t seem to have any ill effects from their sin, they don’t seem to care about what they’ve done, this person doesn’t seem to dwell on it as much as you do. Having been there, I know you think about it, dwell on it, relive the hurt and pain, which leads to depression and for me, a tendency for it to interfere with my relationship with the Lord.
What you are actually doing is giving this person even more POWER over your life, above and beyond the sinful acts they have knowingly committed. By letting it constantly eat at you, they again are victimizing you over and over again because you let them! Forgiveness will take this power away. Don’t let them have any more power over you.
Believe me, easier said than done but you can do it. “I can do all things through Christ who strengthens me” Phil 4:13. Go to confession, confess your unwillingness to forgive, and continue to try to forgive, and if you fail, go through the process again.
God Bless!!