I've had petty fights with guys before that end up with the screaming and crying and harsh words that you've mentioned, so I know exactly how frustrating it is. 

I would advise you both to write a letter (or email) to each other explaining how you're feeling, how it makes you feel when he raises his voice at you, etc, etc.. it's pretty much impossible to have a screaming match with a piece of paper or email.

also, while in the middle of the fight, try your best to say let's take a break..maybe you'll need 5, minutes, 10 minutes, an hour, or a day...but take a break so that you're not screaming and saying hurtful things based off of adrenaline.  take time to think if what you're arguing about is really worth all the drama.

get a self-help type book(s) from your local library or book store about fighting constructively to get helpful advice for your relationship so that you two don't have to break up over something silly.

good luck! xo

i agree with the above advice as well!  i think many relationships have these bumps.  the trick is to make sure the positivity still outweights the negativity.  communication techniques can help, and those can be found in self-help books.

another thing to try, in addition to e-mail, would be sitting back-to-back and talking- each of you gets half an hour to talk about how you feel in your relationship, NO INTERRUPTIONS!!!  time it.  30 minutes.  often it's surprising what comes out, and helps get to the root of the problem.

also, if you guys are in a rut, it could help to shake things up a bit.  if you always stay in, maybe have more date-nights; go on group outings if it's usually just the two of you, or vice versa; go bowling instead of to the movies, whatever.  that can help revitalize things and make sure everything stays positive.

This happened a lot with my first love... We had been best friends for two years before we started dating, so its not like we didn't have anything in common.  We went out for a year but off and on... We had fights all the time about the stupidest stuff.  Finally we decided after I had a miscarriage that we didn't want the stress and if we truly loved each other we needed to start acting like it.  My friend suggested the fireproof book...its a book that is supposed to help couples( married couples but you can use it for you) and it helped us alot.  It made us sit down and when we would start to get mad.. just think about the REAL reason and what EXACTLY set you off. Good Luck