and am just starting to realize that I have a problem. I have struggled with my weight on & off throughout my adult life but have never been more than 20 lbs overweight, but that doesn't matter, does it?
Lately I've realized that I am a compulsive eater at times, that I'm an emotional eater, that I use food as comfort. I've been sneaking food, looking forward to times when I can eat alone, and once I start I have a hard time stopping. I eat too fast and as soon as I'm done I'm looking for the next food to comfort me. Though I am mostly eating "healthy" foods, I am consuming way too much of them and my weight is creeping up slowly. I do this mainly when my SO isn't around, he'd be appalled to see the constant grazing. I'm embarrassed and ashamed myself.
I want to change, achieve a "normal" way of eating where I'm not consumed by food, lose some weight and get healthier, both physically and emotionally. Where do I start?

Well you have already made the 1st step by coming here and admitting it to yourself. You will find lots of support and advice here. A big help to me when I first came here was reading, reading, reading posts and participating too. But you don't have to participate at first, if you don't want. You can just pop in and say HI if you want or just "jump" right in, whatever you feel comfortable with. 
!!
It's SO hard to do, but keep working at it, and it'll become a habit. 