I don't know what to do anymore!!!!!

Only you know the answer to this. Don't let a bunch of strangers online decide the fate of your relationship.

You live in the Department of Motor Vehicles? No wonder things aren't going too well.
Seriously though, if you two want the relationship to survive, then you two are going top have to work very, very hard to repair the damage that has been done. A relationship councilor could help or if you are mature enough, you CAN work on it together.
My first suggestion is to (and I'm perfectly serious here) engage brain, before operating mouth. If you do not have anything nice to say, then don't say anything. You is BOTH of you here, by the way.
The little digs, the quietly whispered things; you know how to push each other's buttons by now. STOP doing it! Think if what you are going to say will start another fight. Sometimes, you can be the bigger person and let a dig slip by, you know. Just ignore it. So can she, sometimes. Don't rise to the bait. You must both take responsibility to stop the button pushing and responding to it.
Remind each other OFTEN that you are best friends, pals and buddies. Lovers and in love, and think of how miserable you both will be without each other.
Some other gal may seem appealing when you two are fighting, but, trust me, that isn't the solution. Be strong and commit yourselves to getting back to the good times. It is hard work, but I believe it is worth it.
Good luck.

Do not be too upset. I argue with my roommate (ex) quite frequently! Mostly because we're both going through a hard time. We fell deeply inlove and depression is a hindrance, in her happiness (mine as well) so it causes arguments we otherwise would not have. If there is love there, it is worth working through. Love is hard to find, if the feeling is mutual; you both could be worse off 'alone' and dealing with hardship alone. No one wants that, it is easy for a stranger to say "Just leave", but it is not that easy and dealing with this as well, first hand, I can tell you, losing a friend (first) and a lover (second) can cause more pain. Finding solace in each other and learning to communicate is key.

Lacking the closeness and bond that connected you guys in the first place, is when arguments happen. You need to be patient with one another and work it through, learn to open up more, show a more vulnerable side, even if it seems like it gets nowhere, if the love is there, it just takes reminding the person, why you feel inlove with in them in the first place.

Love can conquer all, if you truly care enough to work it out and remind that person what made them so deserving of YOUR love.

I wish you luck!
(Fellow DMV resident)

try spicing up your love life. try a swingers club. watch her get boned by some big oblong black meat..

Or if this doesn't sound like your cup of tea.. just get her drunk, rim her and jam urself all the way up to her small intestine.

If neither of these ideas sound feasible, just spank to porn and give eachtother some space.

This bit about her making assumptions about how you're feeling leads me to be that ya'll have communication problems.

There's no reason to be with someone you don't get along with. It's stupid to try.