Your partner’s infidelity is not your fault
Your partner has no right to blame you if you have always been loyal and infidelity comes from their part. If the person is weak and cannot accept his fault, do not let them make you feel guilty. You cannot be the reason of their unfaithful behavior. This is simply their true nature and that happens to many people where only one partner is unfaithful. You deserve to feel respected rather than blamed by someone who has been dishonest.