Can I forgive without trusting a person?
Yes, you can forgive without trusting a person. Oftentimes, we forgive people, but then do not trust them in certain areas where they have weaknesses. A compulsive gambler can be forgiven and yet you watch your wallet, as an example. It also can be the case in which you forgive a person whose character is weakened to such a degree that you cannot trust him or her in many areas. In such a case, you might forgive, but then not reconcile if he or she refuses to change and is a danger to you.
For additional information, see Do I Have to Reconcile with the Other When I Forgive?