I don't think it will stunt your growth, unless you are lifting really seriously as a pre-pubescent boy or something. Growth plates can be damaged if you lift too heavy, but it is probably really rare. Why not just play it safe for now if you are supposed to grow more? You can definitely do the bench press as hard as you want and all the other exercises, but might want to hold back on the intensity of the squats.... that's what I do. Being skinny does have a way to make you look taller it seems, but not much difference either way. One thing is for sure: if you don't get enough calories, you are advised to not work out with the same frequency as those who do. You should be in a calorie-excess state, but since I personally don't feel like eating 6+ meals a day and being a slave to working out, I keep it more casual and just take the slower gains I get. I do suppose growth stunting could occur if you used all your energy on working out and didn't allow any for body nourishment or growing, so that is another reason why I would wait.