Such a cliche. Life isn't static, so we can love it one minute and not the next, so to project that you are somehow in love with life in it's entirety all of the time is absurd. People are born with a certain disposition, and the dynamics of homeostasis continually tries to bring us back to the mean (average), so life will go up and then down, then down and then up, the body/mind constantly trying to come back to the middle.
I don't know why but whenever I see people like the woman who is the subject of this thread celebrating their good fortune, I secretly hope they get hit by a bus. Either way I know that they will soon come back down anyway and realize how premature their celebrations were. If good things happen, stay humble, don't advertise it and appreciate it while it lasts but expect the tide to continue going in and out as it does in everybody life. The moment you take a selfie and post it on social media is the moment you have missed the entire point.