Hi!
I, too, have been struggling with the whole cooking for one issue, but lately it just seems to have clicked with me. I often make big batches of things like red beans and rice or soups, and I'll immediately freeze most of it, leaving enough out for a few days' dinners/lunches until I'm likely to get sick of it.
On Tuesday I made a fabulous red lentil soup and have eaten it with toasted whole wheat pitta and hoummus twice since then. One more serving, and it'll all be gone. I've just kept the soup in the fridge, and it's still fine, but I've been diligent about eating it (easy to do when I love it and I'm too lazy to cook more!)
Tonight, I made an amazing "Irish Risotto" using steel cut oats instead of rice, and I'll probably just refrigerate the leftovers as well.
It's tough not to make too much, and I still find myself throwing bits out every now and then, but it can be done! It also means that I don't have to cook every night. (I also stock up on frozen pizzas and Amy's pocket sandwiches and the like for nights when I really can't be bothered to cook).
I, too, have a tiny kitchen, but when I lived alone for a year in France, I managed to actually cook for myself on just a hotpot! I had no kitchen at all, and the top of the mini fridge served for my cupboard, cutting board, stovetop, and countertop as needed. If that can be done, you can make do in a tiny kitchen, trust me!