Brand new & finding my way

So I'm new to MFP but I'm determined to make this work. I've yo-you'd for years but I'm determined to make a lifestyle change this time. I'm a mother of 3 & since the baby is now 7, it's high time I lost the "baby" weight for good. I've been running for a couple of years with an awesome group of women in my town & that's been amazing & inspiring but I need to do more. I joined a gym last month & I'm loving the group classes (I'm the type that needs the group setting or the buddy system to stick with it-part of what led me to MFP). I've found that my biggest challenge is my diet. You see, I've come to the conclusion that being a skinny kid was a blessing & a curse. Yes, I could eat anything & everything I wanted whenever I wanted & never weighed more than 110 pounds. the curse is that I never thought about whether I was eating healthy foods, or whether my portions were too big. as long as my jeans still fit there were no worries! At 21 I had my 1st child. I lost 25 of the 30 pounds I gained relatively easily. Then life got messy; my marriage was breaking down, I was miserable & the weight started creeping up. At the worst point I was at 155. Then it got worse-I went through a rough divorce & a nastier custody fight. I was a single mom with a 3 year old & stress through the roof. The pounds came off quickly but in retrospect I wasn't healthy. I wasn't exercising or eating healthy-I just wasn't eating as much. After a couple of years life got better, I met an amazing man who is now my husband & we have 2 children. I gained about 30 pounds with each of those pregnancies as well, and lost all but 5-10 pounds each time. My biggest struggle is making healthy eating & daily exercise a way of life. I'm hopeful that MFP will keep me on track & provide the tools & support to truly make healthy living my new lifestyle. I'm looking forward to making new friends along the way!