Re: Jealousy.....good or bad???
You could simply ask her if anything is bothering her. Don't assume anything and act on the assumption. Play dumb. If she says everything is fine then don't push. If she continues to act cold you could try this line, " Look, if something is bothering you then I'm willing to talk about it. If you choose not to tell me then you're just going to have to get over it." Obviously say this with a slick smile.
"All things are subject to interpretation. Whichever interpretation prevails at a given time is a function of power and not truth."