If you've been filled since December of last year and you've only had one fill ... it is no wonder you're frustrated.
The band doesn't really "work" until you have reached a good level of restriction. Very rarely does on reach a proper level of restriction on one fill. I strongly suggest that you talk to your doctor about another fill.
Keep in mind that on average it takes 3-5 fills to find the level of restriction that works for you.
And I know you hate to exercise. I firmly believe that most of us do dislike it to some extent. But we often have to do things we don't like to get the results we want.
So talk to your doctor about a fill and start exercising!