Why do i get anxiety in social settings? why do i get so awkward?

Its probably has alot to do with you not hanging with your friends anymore

The only way you can improve this is small steps in the right direction. Unfortunately, beating social anxiety takes a lot of work.
STEP 1: Get into a workout routine. Put some shoes on and start running for a half-hour everyday. Not only will you lose weight, it will help calm down any kind of anxiety you have, and put you in a better mood.

STEP 2: Write down things that seem interesting to you. Then, start trying some new hobbies, and learning some new skills. Find something that you really like, and find meetup groups where you can meet people who are interested in the same thing because the easiest conversation to have is a shared interest.

STEP 3: Start engaging conversation with people you come in contact with everyday, such as the grocery store clerk at a grocery store or clerk at a gas station. If you do this enough, eventually you will get more used to interacting with people everywhere you go and it will slowly become a part of who you are.
Once you get comfortable with these steps, you will have built confidence and charisma. So, when you go out by yourself you won't feel as anxious, and it will be a lot easier to make a good impression on that girl you possibly want to approach.

What you are experiencing is completely normal. I have social anxiety a lot too. In my case it's because I have Asperger's Syndrome. Sometimes I feel akward and out of place in social gatherings because I am afraid of what people would think of me. I'm overweight too but I have lost some weight.

I wont tell you, what you already know.
Lose some weight, if you are happy and content with your own self you will have more condidence in public.
Battling weight is an issue.
Especially if your job has you sitting all day.
You dont need a huge wardrobe.
That said.
( slaving at door dash )
If you dont like your job.
Improve your skills and find a better job.
Dont remain in a place that you dont like.
But dont expect any job to be a cakewalk either.
The people you work for. The pay, benefits, respect.
It should all work.
If it doesnt.
Move on.
I can't explain why some people are more sociable.
You just have to deal with the card you have.
At your age, and if you can handle long hours of driving, being alone.
You might consider driving a big truck.
If you do it right you can make good money. Not have to be social, nor do you need much wardroom.
Just a thought.

Why use @ when just typing at takes even less effort and is slightly faster

Social anxiety. It can develop at any point in life but it usually stems from something, like a really bad social experience or several that fucks you up so much you start avoiding social situations to the point where you become so nervous it turns into a phobia.
It sucks but there's therapy and there's ways to practice it yourself too. Basically you just gotta identify your anxious thought patterns to change them and also start socializing more little by little to practice and get more comfortable.