You feel like crap because you miss your wife, and your marriage is up in the air right now. Maybe she had to get out and cut off all communication (except regarding the kids) so she could start processing the TONS of emotions that she has to deal with now. Maybe she needs TIME and SPACE. Give it to her. This takes longer, A LOT longer than we want it to. That's where PATIENCE come into play. If you're committed to your wife and your marriage, back off and give her the space and time that she NEEDS. It's hard, and it feels counterintuitive, but it's absolutely necessary when the situation warrants it. Don't despair, and don't give up. Love her, honor her, and cherish her by giving her the space and time that she needs. Look at it that way, it might help you. Sometimes they can't even start to heal until they are away from us, and communication is practically not there! Keep working on yourself, focus on your kids and your job. What's to lose by going this route? Detatch, and 'drop the rope'.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.