How to get over social anxiety?

Get over it.
...Well, thats what my professor says, he's an introvert but he seems like an extrovert.
His class, you must say something for input in order to get an A. If you don't, you won't get anything over a C. And thats how life usually works. It gives you priority to rid of your social anxiety in a timely matter.
Now my answer...well, first is targeting your issues. Keep a journal and write down all your anxieties. Your feelings, your actions, everything. Don't leave anything out.
After that, I would use false confidence. Whenever you're around people, fake your confidence in yourself. Never say anything bad about yourself even if its false. Don't even think about anything bad about yourself. You're perfect. The instant you say something bad about yourself, I'm going to lose interest in you. Simple as that, screw your drama. Praise yourself whenever you speak out your mind.
After that stage, you should lose your anxiety. You'll think less of how people think about your responses, which is the majority of the problems most people fear.

I think i have a similar problem. On the internet, it's much easier to talk to people given you have time to think about it, and i'm more open towards my friends. I think the answer is more KNOWING what you have to say, and knowing the idea can be accepted the way you want by those around you. I over-think this and end up extremely quiet, afraid of other peoples' responses. The quickest way, i think, is having something to speak up for. My mom had this problem and it went away when i was born (the something to speak up for). You need a real reason to get over it. I haven't found a reason yet either.

Have you actually been diagnosed with social anxiety? Or no? Just try and spend more time with people to ease your anxiety/shyness. What makes you feel anxious?

So while some people say oh go out and try to make friends and practice talking that can sometimes be to hard and not really productive. I do have social anxiety diagnosed and everything and there are a few things that help me.
1.Don't spend time around people every second of everyday try getting some alone time and do somethings that you enjoy.
2.I have some friends with social anxiety and i helps because they understand that sometimes we need to be left alone and they respect that.
3.If you do have to be in places with a lot of people,like school, and you start to freak out try focusing on something that doesn't bother you like a book or a poster on a wall.
4.As for the speaking in front of your class you can ask you teacher if you can present it just for her they will usually understand.

Hmm... I don't know. Ever since I finally got a job a couple years ago, I haven't felt as... awkward. I mean, I still do, but I begin to not give a fuck after a while.