Hey, it gets easier. I know everyone else has said this, but it really does. I split with my partner of 8 years back in October, and I felt like crap for weeks after - slowly things got better. Things did take a turn for the worse over the christmas period, which was lonely as hell, however, I think I may have got through that now. You will feel better, and you'll probably relapse at some point as well. Things will remind you of her (no matter how hard you try to remove any reminders), however, you will have to deal with this as and when.
Have a cry, write your feelings down on paper, talk to someone, hell, talk to a pet - just don't bottle them up.
With regards to how she is feeling, it doesn't matter. She might feel crap as well, she might feel fine. However, you cannot affect this now and it has no direct effect on you. You need to concentrate on yourself.