Recovered Bulimic?????

I started purging when I was 14 in 2009. I waited less than one minute after the last bite of a meal, and then I would puke. I would only eat once a day, and purge it all. I went from 145 lbs at 5'9.5" to 111 lbs in two months. I stopped during the summer of 2010, and started again when school started. This time I would binge eat, wait a couple of hours, and purge whatever was left in my stomach. Sometimes I didn't purge at all after consuming AT LEAST 5,000 calories. Obviously I gained weight rapidly, and I maintained a weight of 138-140 as I continued purging. As of March this year, I haven't purged AT ALL, and my body is now used to food again. For a while, the binge eating remained, but now it's calming down and I can eat a healthy 1,200 calories without feeling deprived. I gained all of my weight and then some and I now weigh 159, more than I did before. I was wondering, will my metabolism get back to normal? Purging was the worst chapter of my life, so i am trying to lose weight the healthy way now. However, I am still in "starvation mode", so I am unsuccessful as of right now. If I continue my new healthy lifestyle, will I be able to get my metabolism back up?