Temporary escapism is reasonable. It is similar to the psychological defense of denial. Psychological defenses in the short-run are good because they keep us from severe anger or anxiety. In the long-run, if all we do is use denial or escapism, then this is not allowing us to deal with the heart of the problem, which is to heal from what happened. As an analogy, if you have torn muscle tissue in your knee, and this requires surgery, you are not healing the knee by denying the extent of your injury. To forgive is to face the reality of deeply unfair treatment, the dangers of resentment, and your need of healing.
For additional information, see Why Forgive?
Feelings of revenge can be part of the preliminary process before a person commits to forgiveness. In other words, the process of forgiveness allows for a period of anger. At the same time, you do not want to act on revenge-feelings, but instead realize that revenge-seeking can harm both you (because of harsh emotions that can lead to anxiety or depression) and the other person. So, feelings of revenge are not part of the forgiveness process itself but can be present prior to the decision to forgive. Forgiving can go a long way in eliminating feelings of revenge.
Learn more at What is Forgiveness?
Sometimes our anxiety comes from not feeling safe. Sometimes our not feeling safe emerges when others treat us unfairly. In other words, you may be expecting poor treatment from others now, even those who usually are fair.
A first step may be to think of one person who may have hurt you and at whom you still harbor resentment. You can forgive through the exact same pathway as described, for example, in the book, Forgiveness Is a Choice. With anger lessened, anxiety can diminish. Of course, this will vary for each person. We have to be gentle with ourselves as we learn to forgive, to give up anger, and to know with some confidence that we can meet the next interpersonal challenge with forgiveness, helping us to meet these challenges with less anxiety than in the past.