Of course - another approach is to make plans to go away for the next week when he gets back. Tell him you just need to "get away and have to do this". Leave him totally in the dark about where you're going and with whom. Or let him know you're going to Cancun or some such exotic locale.
Don't take his calls while you;re gone. Let him worry about whether you're doing anything with another man while you're gone (you don't have to say anything, it'll be on his mind). Get massages and drink Mai Tais by the pool and read trashy novels. What's sauce for the gander is sauce for the goose, hey?
