Reading does help. But honestly -- I don't read novels all that much, and I'm at least a decent writer (or at least I like to think so).
A few basic tips for you:
Show us what happens, don't tell us. It's a basic premise in writing, but don't just list off things and why they are important. A basic example would be instead of saying "She is sad," you could describe what she's doing that makes her seem sad.
Another thing to keep in mind is use all of the senses, something I'm guilty of not doing enough of. Think about real life -- yeah, the first thing you remember about New York City is how tall all the skyscrapers look. But describing the scent of the freshly baked pretzels from the street vendor on the corner is just as important in making a scene seem real. Use every sense you can -- maybe not every time, but try and mix it up a bit.
Also, keep the dialogue flowing, if you can. Don't interrupt it every line with a huge paragraph about how the characters are feeling or what they are thinking. Let them speak, and show us how they react. Also, to keep the lines realistic, try listening to how different people speak. Read the dialogue out loud if you have to, but try and make sure it sounds like someone would actually say.
Granted, I'm no expert, but if you keep these basic tips in mind, they should help you. But again, my word isn't gold, so you might want to take other opinions into account as well.