Having talked about hope, the will and honesty, talk to your friend about additional support , both within and outside your chapter. The first place you friend needs to look is, of course, to God. If your friend were an alcoholic who had just been released from a rehabilitation center, they would be told to go to 90 AA meetings in 90 days. While I know of no place in the country where that kind of support is available for those with a homosexual struggle, there are several sexual addiction groups who, while they don't deal specifically with homosexuality, can offer help in breaking compulsive, addictive, sexual behaviors. They deal with all kinds of addictions, are specifically Christian, and might give good support.
Some problems are so deep-seated that they require specialized help.
If that is the case with your friend, help them find the help they need. Encourage them to keep trying everything available until they find the right combination of help. We cannot change anyone but ourselves. We can show people how to change themselves but we cannot change them. While all fear is not laziness, much fear is exactly that.