Your waist is TINY!! Wow. How are you finding maintenance to be?? It seems as though you are an active lady though so I don't think it's as hard as someone who just exercised to lose the weight and stopped after goal.
I've been maintaining for over 2 years now. I continue to be very active, and that certainly helps! When you burn a lot of calories, you can eat a little more! I love all of the activities, so it's not hard to keep that up. It's just part of who I am now.
For me, maintenance goes in cycles. Sometimes it seems easy and other times are harder. I've gone COMPLETELY off plan sometimes (especially during vacations and travel), but I just get right back on track afterward. I still go up and I go back down (yo-yo), just within a much narrower range.