Maybe your husband has had a true awakening to what really matters or, he got dumped by his girlfriend after she used him for her own gain. You need to fully evaluate the situation before deciding. If he comes home find out for how long or if he intends to remain married to you.

As for your friend, dosen't he have a heart big enough to wait this out and do you have a heart big enough to love two men?

Good luck to you.