You're jealous and suspicious of her playing an online game?
Do you have this woman's number? Then how about calling? You know, on a phone. No Skype. Pay a little for this contact (a lot of people find phones harder to ignore than Skype). Ask how she's doing with her new schedule. You know, like nice people do. As in, find out if it's very tiring, etc. Because such things can be.
And maybe reassess your own habits. Are you on with her for hours and hours? If she doesn't have the time for that now, she might be avoiding you because she doesn't want to start four hours online when it would be easier for her to just go on for 20 minutes and then get over 3 1/2 hours of sleep.
After all of this (yes, go through this first - you know, act like you care about her well-being, rather than your own butthurt) then ask where you stand.