Loose skin/Wrinkles in my boobs

OP asked for answers on how to gain muscle. For OP this is a healthy goal. OP will gain muscle weight, which is good. OP probably does have an ED of some sort, but a thread of this nature sort of points towards progress, so I'll offer a helpful opinion.

Nadiabear14,

All the calorie calculators in the world are off by some degree except one: Your body. The tools are good and all for a general ballpark, but only your body will be totally accurate, because that's what the calculators are guestimating. If you eat a certain amount of calories and lose weight you're eating at a deficit. If you gain weight you're eating at a surplus. If you do neither, it's maintenance. Let your body tell you what your numbers should be. Right now you need a bit of a surplus.

Eat more protein. You've locked off your diary, but if you're intending to gain muscle you need protein to feed it. I would say..about double what you're getting now. Maybe triple, but I can't see your diary to say so. You'll also probably want to increase your fat intake. Fat does not make fat. A surplus of calories makes fat.

You WILL gain weight. This is a good thing. Don't freak out and go crazy cardio lady when it happens. Also, fix your "goal weight". Showing that you need to lose 16 lbs from 96 puts you at 80lbs. It sounds more like a goal weight for starving yourself to death. I would suggest setting your goal weight around 110. It should help fill out your boobs and loose skin a bit. It also won't happen overnight unless you're just packing on fat. Gaining muscle is generally more difficult and takes longer than losing fat. Patience is a virtue.

As for exercise. GET OUT OF THE GROUP EXERCISE ROOM! And the treadmill and pretty much any other hamster wheel you've been on lately. You CAN NOT build muscle doing cardio. You can build muscular endurance, but very VERY limited muscle gain. Start a lifting program of some sort. If you go with Stronglifts 5x5 you'll have a huge support group on MFP, but it may or may not be the right option for you. There are plenty of other options. Some people go with starting strength, kettlebells, dumbbells, or whatever floats your boat. Walk into the "bro" room and pick up some weights. Figure out what system will work for you, start slow, and work out with weights in a "progressive overload" (please google this term and do some self research). The key to a good lifting program is to A. find something you like doing (or you will quit) and B. do something that works out all of your major, median and minor muscle groups, in that order of focus (or your muscular strength will be imbalanced).

TL;DR: Eat more. Eat more protein. Gain a little weight. Cut back on the cardio. Increase the weight training. Profit.

The fact you have had other accounts kind of speaks for itself. I am sorry but I can not support an eating disorder.