Having trouble starting

What is your question?

At first, out of nowhere my car would crank but wouldn't turn all the way over. After so long of trying though it would start. Thought it might be a fuel filter; so I topped my gas tank, put fuel injector cleaner in it and thought it was fine after it ran 2 days no problem. Nope. I have the new fuel filter, but before I replaced it, problem got worse. Now it will not crank at all, and none of the dash lights come on when I turn my key, but the radio and the clock will still come on. Keep in mind, after I mess with it for so long, sometimes it will start. Once it starts its running fine, it has yet to die while in use. The problem is getting it to start. Any information is greatly appreciated.