I've told my husband about my eating habits. In fact, we discovered our love for food together. Well, we became conscious of it as a couple, simply because last year we both put on 30-40 pounds. It was a stressful year, and we just rolled with it - literally!
We are in similar weight ranges for our genders, both in the "overweight" category. When we first met, we both said we wanted to be with someone who cares about their weight, especially as we're getting older. When we realized we had both put on some stress fat, we started talking about it.
We talked about the whys and hows of how we gained weight. It was simple: we ate to comfort ourselves for our individual stress, and turns out, we were good comfort and eating buddies - binging on pizza, Chinese food, and ice cream most nights and weekends. We were too bogged down by food to work out, so we just didn't. We were together and in love, so we were quite comfy with our fat selves.
When our pants didn't fit anymore, both of us having breathing and tummy issues, and being too tired/sore to last through intimacy, we talked some more. This time, we talked about how to lose the weight. We started cooking at home and going to the gym together. We tried working out together, but we needed different things, so we ended up doing our own thing.
We also tried being each other's "motivational coaches". This didn't work at all! We would have different strengths and weaknesses on any given day, and when I wanted my ice cream, I didn't want to be questioned on it. Nor, when he was eating half a pizza, did I want to be his nutrition coach and tell him what to eat. When it was that time of the month for me, I didn't want motivation - I wanted my chocolate bar, pjs, and a movie. When I was energetic and he was tired from law school, he didn't need an extra "push" to go for a run.
I'm thankful and fortunate that my husband understands what I mean when I say that I binge. He doesn't freak out, and he supports me when I tell him that I'm counting calories - again. Interestingly, my friends do not understand my issues with weight. They have told me that I shouldn't worry about my weight, I look beautiful, and that eating a lot whenever I want isn't a big deal. (To clarify, I'm working on my weight because my family has a history of arthritis, and at my heavier weight, I can feel it to the bone. I'm confident in how I look, but the lack of motion wasn't working out for me, so I went on this weight loss journey.)
To finish up this lengthy post, I think it's great to tell your friends, family, boyfriend about your eating challenges. If you already know how they'll react - great! If you're looking for something specific in their response, you may need to let them know what you're looking for in terms of support. I was surprised at both my friends freaking out and my husband's unwavering support (I was expecting my friends to understand my food/weight struggles, and I expected my husband to get tired of the constant talk of calorie counting and post-binge emotions). While I was pleasantly surprised for my husband's support, I wasn't ready for my friends' reactions. My friends' reactions actually pushed me to binge, which is why I suggest being prepared for unexpected reactions when you tell people about your struggles with food.
Best of luck!