Am I An Extreme Introvert?

Last night I went out (somehow I convinced my grandmother to let me, don't ask how because honestly I have no idea...) with my current boyfriend. We went to his friends house for a bit and honestly? It was kinda nice. We walked to the park and played pool, we weren't there long though. I was a little anxious, don't get me wrong, but it was nothing compared to what was to come later. Later that night we attended a party, aka a hell-hole for me. There was maybe 4-5 people, less than that because they came in and out. I felt incredibly uncomfortable. I refused to speak and all I wanted to do was to cry! I kept my nose in my phone as long as I could until it died. So I left. I sat in the car until my boyfriend waddled out to let me take him home.
This had me thinking about being an introvert. I know, I suffer from PTSD and it is the reason I feel like I have to constantly have an escape route. It's the reason for my unneeded fight or flight instinct, too. But, what exactly is my introversion? Is this normal? Is it bad that I'm an introvert?

Introvert is defined as a shy, socially reluctant person.

If it was up to me, I'd describe it as crippling anxiety and fear of social interaction, but then again maybe that's just me! If I walk by a group of people and they start laughing, my mind instantly shoots to the idea that they're laughing at me. I did something wrong. They hate me. Is this introversion? I don't think so, I personally think it's more of a symptom of my anxiety.

I love being alone. I love being in company of someone I care about deeply too, but there's a limit until I have to resort back into my hermit home under my covers nuzzled into my computer. This is a terrible thing because it makes it hard for me to keep friendships. People assume I don't like them, or I'm rude just because I prefer to be alone.

How to Quickly Get Over a Breakup

You don't. I mean this in the nicest manner possible. You can't quickly "get over" a breakup, especially a long term one. I think after two of these devastating events I'm pretty advanced on the topic though, so I figured I might as well try to give SOME tips, if I have any at all. I haven't exactly prewritten this post and I'm kind of totally winging it, nothing new, right?

1. Live your life. Seriously. I know it's going to be hard but, I mean, what have you left to loose? Maybe that's pessimistic optimism, I don't know. You're the only person who can live your own life though so don't rely on others.
2. Focus on you. In the end you're all that matters. Yes; the person you loved very much walked out and changed on you. That doesn't mean it's the end of the world even though it probably feels like it. 
3. Preoccupy your time. Spend plenty of time with friends and family, try not to have much if any free time. Time to sit, is time to ponder. Nothing good comes from dwelling on old memories and all thoughts. 
4. Learn from your mistakes. Look back, what caused your break up? Was it you or them? Try to figure things out honestly before pointing blame. Take this as an opportunity to learn from your mistakes. 
5. Don't deny it. I know it's a common coping method, but honestly denying your pain is only going to cause more pain in the long run. Accept fate, accept what happened and try to make the outcome more positive rather than negative.
6. Think of the bad times. Remember when your partner stole your hat and didn't give it back for months, without your approval? Or when they burped in your face and laughed about it on your first date? Try to remember all the negative things, even though your mind will want to keep reliving the happy moments. If you broke up, there's surely more negative times to keep your mind on.
7. Be thankful. Fate says you didn't belong with that person, be thankful you didn't waste even more time with them. 
8. Remove anything that triggers painful memories. I'm not telling you to throw away every gift they ever gave you, just hide them somewhere you won't accidentally find them. I know, I had a Build-A-Bear from my ex and when you pressed it's paw his voice said, "I love you". I used to ALWAYS stumble on it or accidentally lay on it and the voice through me into memories and endless tears. You DON'T want this!
9. Remember; crying is okay. It's okay to cry if you just lost a very important person in your life. It isn't okay to sit in your room all day moping and sobbing endless though. 

I know I'm certainly not an expert, and this post is very terribly written, but I figured maybe I could at least help one person. That's all that matters.