I feel so bad for my friend...

I have this friend that my family basically adopted in over the last couple years; he's like a brother to my sister and I, and a son to my mom. I remember going to see a movie with him several months ago and he was talking to me about this girl that he dated for about 3 years; he said she was absolutely perfect for him and they were very much in love, the only thing he couldn't stand we she sang terribly and did it all the time! The reason they broke up was that he was getting deployed in 2 weeks and wasn't able to tell her where he was going and had no ability to communicated with her whatsoever due to the mission and location, on top of that... he was going to be gone anywhere from a year to two and didn't want to put her through that; so he broke up with her. When he got back from the deployment he went back to her old house only to find out that she had gotten married and moved to Colorado.

A couple months ago we were having dinner and he asked me if I remembered that girl he talked about in the theater (I did) and mentioned that she had contacted him out of no where. They started talking several times a day; calling, texting, emails.... she would stay up really late to talk and text him in the middle of the night saying she was thinking about him. She came out to visit him for a week, he went to visit her and everything was great, they got along extremely well (and she can sing much better now). My friend seemed so happy and very much in love... problem is, she's still married! Once I found that out, I was not very happy with him (as he knows my stance on affairs). He said that she was extremely unhappy and that her husband completely neglected her and they haven't had sex in months... well before she started talking to my friend again.

Over the course of these few months, through texts, calls, emails, and little things... it did sound like she was going to leave him and move to California. She told my friend that she had this mission trip to go on in Mexico for 16 days and there would be no communication. He told her that his fear was that she would go and feel guilty about everything and stop communicating with him. She reassured him that it would not happen, she would never hurt him, and once the trip is over she is going to move and asked him to help her find a place.

He had a rough couple of weeks not being able to communicate with her and I've done my best to keep him occupied... today was the day though... she came home. I sent him a text earlier today to see what happened and if they'd spoke... nothing. I kept thinking that her phone must be dead. I text him again later to see if she'd called him... nothing. She'd been home for hours and didn't respond to his text or email. My sister and I hope so much that she has/had a really good reason for not contacting him, but I think we both know the answer. I am so sad and hurt for my friend... he is absolutely devastated. I know he put his whole heart into this, and reading some of the things she said to him before she left... you'd have thought they would have that happily ever after, but no. I should be happy that she stayed with her husband, as it's probably the right thing to do, but so sad for my friend who was preparing for a future with her. I wish I had the words to say to him... but there are none