I think it's amazing you admit you don't know exactly what you want in a relationship. It means you're open to re-defining it as you learn more about yourself and the other person. Most people walk into a relationship with rigid expectations, which means they are doomed to fail when they don't find exactly what they are looking for.

As far as wanting to know what makes a great boyfriend goes, it really depends on the other person. Sometimes really small things can make a really big difference in a relationship. For me, I love it when my husband makes my life easier by doing little things for me. Like a cup of tea when I'm tired. Her needs will be different than mine. If you watch her closely, you will learn what little things you could do to make her day easier. They don't have to be big things.

Also, some women like to talk about things and sometimes all we want is for someone to listen. I don't expect my husband to solve my problems, sometimes I just need a good ear. I think most women want to feel like they matter, so noticing things she does that make her unique and commenting on it to her might go a long ways.

My husband says things like: you always know when someone is sad, it's amazing.

Don't know if this helps, but it's the kind of stuff that made me happy to have someone in my life.