For some reason, Ive been very awkward and uncomfortable talking to people for a few years now. I won't know what to say, sometimes I cant look them in the eyes, and also I studder and stumble over my words. Im a college girl. What's wrong with me?

Probably nothing a little speech therapy and practice can't help you with.

Just like you can't become a pro golfer your first time out, continue practicing and you will become more comfortable in speaking with people.

Just like the others said. Takes practice. Have you tried toastmasters? Or other public speaking type of courses that you can take on the side?

There is nothing wrong with you, all you need is to have belief in yourself and a little practice. You may imagine situation and have a conversation with yourself in front of the mirror. Just simply remember that you are awesome and others are just people like you.