Running making me bigger?

I've been exercising regularly for 3 years now and lost a lot of weight, Now, it's creeping up. Running has made my thighs huge and has made my stomach bigger. I've also gain weight. This started few months ago when I started running a lot more, for 1 hr EVERYDAY. Before that, I'd run for 30-40 minutes and I was a good lean 110 lbs. My thighs were perfect size, and I had a really flat stomach and I loved my body. Now, My stomach is growing, I'm starting to see some "love handles" , my thighs and hips growing bigger ( fat around hips), and my weight is creeping up, because I've started running A LOT more. Now, I've been eating healthy and the same amount as I have been before, so, diet is not the issue. Do you think it's because of water retention from the running, or something, or that my body is trying to save energy by storing fat for the long runs? Is it like the "camel" effect? What can I do to get my old body back? Should I just reduce the amount of time I'm running to what it was before? What should I do? Any suggestions?