<human>: So about 4 years ago, I was 105lbs at 5'3. I started taking Paxil in 2009 and by Christmas of 2013, I was 150lbs. My GW as of today is 130lbs, my CW is 139lbs. 

I noticed my weight fluctuates - a lot. I was excited to be 136lbs about a week or 2 ago, but as of yesterday, I'm back to 139. 

I exercise about 3 times a week for two hours (I've been doing Muay Thai for about 1.5 years). When my weight goes back up, I find my motivation goes down. 

I try to limit carbs, though I don't deny myself of a piece of toast or pasta, if that's what I really want. I try to keep my diet high in good fats and protein (nuts, avocados, eggs, meat, etc). I try really hard not to snack, and pick have a fruit or veggie if I'm really hungry. I tried counting calories but I would become OBSESSED with what I was eating, why I shouldn't eat certain things, etc... So I don't let myself do that any more.

Summarize the given text in a few sentences.
<bot>: I apologize for the long post, but I could really use advice or tips for how you stay motivated when your weight is fluctuating.