You cannot do his work, and must not attempt to do his work for him. I understand his fear of this type of stuff, but at the same time, if he isn't willing to take what he feels is a risk by either asking her out or doing a ritual, then do not do it for him. If he is unwilling to use magick himself, he must use conventional means, which in this example will be far wiser. There are a few, well practiced Witches who will do work for others if they are requested. Normally, Witches will assist a person by showing them how to help themselves, but will not do it for them.
Self empowerment is what it is all about.
Basic relationship skills are now needed for the two of you to stay together and faithful. True love is the most frightening aspect of life. When we love someone completely, we open our hearts to them completely. This places them in a position to really hurt us if they turn out to be not the best partners. This gives us a sense of helplessness and loss of control.