It's generally not the best idea to add other weighted exercises to the 5x5 program, such as hamstring curls. Trust me, your hamstrings will get plenty of work. Make sure you're driving from the hips when you squat. This will involve your glutes and your hamstrings. Make sure you have enough depth on your squats too or you won't involve your hamstrings.
Deadlifts will beat the hell out of your hamstrings as the weight get heavier. Just shove your hips forward as hard as you can as the bar passes your knees: you'll feel it in your hamstrings. Keep increasing the weight progressively and your hamstrings will scream for mercy eventually. '
You've made some good progress, keep it up!
Also, about the eating 6x/day thing, you shouldn't eat 6 full meals per day. You should divide your total calorie intake into 6 smaller meals. So for example, let's say you're trying to gain weight, in which case you want to start with eating your body weight times 18kcal daily. You're about 115, so you want to start with approximately 2000kcal per day, so you'd want about 333 kcal/meal. Dividing up the meals has other benefits (search on the blog for a more in-depth analysis), but it basically allows you to never be hungry throughout the day, and eating six smaller meals as opposed to three larger meals boosts your metabolism more, and ensure you won't have extra carbs and such being added on as fat, as long as you keep a clean diet.
Good luck with your progress!



