Oh, Rusty, Rusty, Rusty..

No, just no. I'll cut up and explain exactly what you did wrong.
Why? Well, because I speak part "chic-inesse". (no offense meant to anyone)
I told her we can still be friends.
Your first huge mistake. If any Female gives you the green light to date her, the only way you can turn back from that, most of the time.. is when they dump you.
I know of almost NO girl, who wants to have an open friendship, with a guy who more or less rejected them after so much time spent together as a couple. Unless it was mutual, or the Female is a really special type of breed.
I told her that it just wasn't working out for me and that I needed my personal space.
Worst possible thing you could've said, next to openly saying she's either fat, and/or ugly.
Explaining to a girl, firstly, that it's just not working out.. is like sticking a knife in their chest. You're telling them that, basically, to you.. she isn't worth anything.
Adding to it that you need personal space, is like taking that implanted knife in her 'said' chest, and twisting it. Because to them, that's adding on top of everything, that she was so awful.. you're either coming up with an excuse to lie about finding someone better, or you're turning off female's because she was so horrible you couldn't bare to continue to another one without recovering from this disaster.
Duh.
had a bitch fit and tried to make me look like the bad guy.
Rusty, rule #27.. you're
ALWAYS the bad guy. In the female's guide to Male's.. the male is ALWAYS the ********ed, prick, jerk, jackass, bastard. Nothing you do can ever be right, and especially not when you try to initiate the break-up.
Which likely made it worse. Because you weren't showing any emotion, which likely told her that she never, not even for a moment, mattered to you in any way, shape or form.
because I really didn't care in the end.
My point, exactly.
Sometimes, I wonder why I am nice to women if shit like this is going to happen.
But, once again.. you aren't nice. You're male. Confusing, I know, I know.
Truth is though, you must continue to be nice, because one day the "right one" will indeed come along. And you'll want to be the most of yourself you ever can be. So if yourself is truly nice in the end, then be nice.
However, if you want something worthless, be a jackass. It's like chocolate to fat kids. It'll constantly bring in something less than worth it, because they want an asshole they feel they can mold into something great. Once they do, they'll leave you for another asshole to attempt doing the same.. until they get beaten and abused, enter rehab, and realize the error of their ways.
It's not like I dumped her for anyone else,
She thinks you did, though. And that's the only part of this that matters.
Nothing you could say is ever going to be true, even if it is.. because.. got it yet?? You're.. A.. MALE!
Seriously though, whenever you dump a female, 9 outta 10 of them will believe regardless the reason given, that it was for another female.
I just didn't like her anymore.
This is an unacceptable answer in the Female-Universe. NO female is ever "unlikeable", ever. It's in their handbook. I seen it once when I was pretending to be asleep.
Its the sad truth too. NO female is ever going to fully except that they aren't likeable to any guy they could ever have feelings for. If they do ever come to that conclusion, grab hold of them instantly, because they're a rarity. (likely a former guy, in truth)
It's never simple with Women.. you'll learn that one day.
In complete honesty though, being 100% serious.. she likely took it hard, because break-up, for males and females alike.. is a hard thing to handle if you actually like someone. It can be real love, or just a school-yard puppy crush. It all hurts in some fashion. Some more, some less.. but all of it hurts, regardless.