In the Catholic Church, what are the options for a person whose spouse abandons them?

In the Catholic Church, a marriage is considered a life-long state that can't be dissolved. However, it sometimes happens that one spouse abandons the other. For example, let's assume Alice is married to Ben. Their marriage is valid, but some years later Ben leaves her. Alice tries to reconcile, but Ben refuses contact with her. According to the Catholic Church, Alice definitely can't get married again. How is she supposed to live her life? Could she join a religious order? Or does she have to be alone until she dies? Also, Catholics widely claim that a child has [a right to a mother and a father](https://ccgaction.org/unconvention_rightsofchild) . Assuming Alice has children, how does the church justify that she now has to raise them alone, rather than finding a new husband? From her perspective, the situation is more similar to the death of a spouse than to a normal separation, since she did not consent to the separation and cannot do anything about it. In this hypothetical, Alice did nothing to "make" Ben leave her and he refuses any attempt to reconcile. I think reasonably similar situations are quite common in practice.