Lost willpower and motivation

Has anyone else lost a substantial amount of weight, becoming comfortable with the loss, but still needs to lose more because of a set goal that needs to be met, and has lost all motivation? Yeah, that's where I'm at. But now I'm gaining again, and I'm having a hard time finding that state of mind I was in when I first started losing. I started at 244, got down to 162 at one point in time, and I'm now back up to the 180s. The disappointment in myself can be cut with a knife, it's so thick. And so are my thighs. When I started I bought a year long planner. You know, those ones you get in the office department at that horrid place that starts with a W. Anyway, I used it as a journal to just write whatever I was feeling, set goals, the works. That was nearly four years ago and I still purchase one every year and continue to use it. I also have a binder where I keep collected weight loss stuff. It worked so well in the beginning, but it doesn't seem to get me as motivated as it used to. Well...it does at the moment I'm writing in it...but hours later.... I just want my state of mind back. My head was completely in the game. I was strong willed and hey, I did lose a lot of weight. A lot! But then I got comfortable. I set a goal of 150. I must get to that goal. What's the point of setting a goal if you don't meet it? Does anyone else have this issue?