I know that love is really important -- but I don't think people really understand what love means. I got married at 18 and divorced at 23. (I'm 25 now and getting married next month)
Love means you are both looking out for the other person's best interest. You do everything you can to make her happy and be sure that she is going the same for you. That means that you do the dishes because you know that she worked all day and is tired too. It means that she helps you with the yard work because she doesn't want the whole burden on you.
Never say the word divorce -- unless you seriously mean it.
Always talk and find out what she means by what she says. A good way to do this is to tell her what you understand her to mean by what she just said. Example: She says, "I want you to stay home saturday instead of going to the game." You say, "Did you mean that you do not like me going to football games?" and she says, "No, I wanted you to take me to our favorite restaurant this time." Communicating is not talking a lot -- communicating is finding out how the other person truely feels about stuff and what they are really thinking. And even if you have to talk 4 hours to settle things, do it. Its not a waste of time.
Ask her opinion on things before you do them. It doesn't mean you have to do everything she wants, but just by talking to her about it, she'll feel more valued.
Ask her now if when she gets upset if she wants you to follow her to hold her. Most men would rather have private time and women would rather be held when upset. (not all, most -- ask her)
Not every couple argues. Don't accept it as normal. Some couples do actually talk things out instead of fussing and that's the goal.
Try new and interesting things in bed. (buy Laura Corn's book "52 nights of great sex")
Your relationship will either get better over time or worse. Its up to you to either work on it or let it go down the hole.
YOU do the right thing even if she doesn't.
Compliment her and tell her you love her.