Who was Titus to Paul and why was not meeting him such a disappointment?

Les explains that Paul was not forsaken but cast down, laid in a bed of sickness, and experienced disappointment because he had not been able to meet up with Titus. Titus was like Timothy, a part and parcel of Paul's whole ministry, so the missed meeting was a real disappointment. Yet Paul says he was not destroyed. The setting indicates he had just gotten up from a sickbed he thought was unto death, and he saw himself as dying even in the midst of service for the Lord so that the life of Jesus might be manifest in his body. While on that sickbed—assumed to have been at Philippi—he thought his ministry had ended, but he was confident he had done as much as the Lord intended him to do. This also relates to his later writing to Timothy near the end of his ministry.