It's best not to push the issue. Talk with her and be friendly, but not overbearing. I know you've heard it a million times, but relax and be yourself. If she doesn't like you for who you are, then she will not like you in the long run. You have no idea what she is thinking. You may gradually find out that you have a lot in common - even if you never date, you could be friends.

About the age... That's a variable thing. Age does not matter in love, but the fact that you bring it up makes me wonder how you really feel about it deep down. If she's still a high school underclassman and you're in college, you're pushing it. You may get heat from her parents too.

Don't worry. You'll know what to do.