There is some stuff I'm wondering about, if they are socially acceptible. Sometimes I feel awkward, if there is a girl I'm seeing, and she asks me if I want to join her somewhere like going to the cinema or something with her and her friends (which I don't know at all) I always feel the need to have someone I KNOW to be there if things turn awkward.
And when I'm invited to parties, I feel like I just can't show up alone and I need to show up with company. Do you feel like this too?

It's how you feel, the fact that someboy here feels the same is not gonna change anything. What you should be focusing on trying to understand why do you feel like that maybe you just have aa and you don't know.

THis video might help you out. Good luck
http://www.youtube.com/watch?v=gbjRPDVW ... 8e7czWnPMt

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Winners have simply formed the habit of doing things losers do not like to do 18/03/12

Yes, I guess what I want to know if this is something people that don't have AA or SAD also feel, or if this is "normal". I mean, if there's a party you mainly just know the host or maybe 1 other person, would go show up alone? because I always feel more comfortable showing up with 1 other person at the doorstep, gheez this sounds ridiculous :L and when I'm asked to hang out with a girl and HER friends, I always feel like I need to have one of MY friends with me too.

Don't use not having your friends as an excuse to not do something, try some daygame that would be great for you.

Here you have some tips as well.
https://www.youtube.com/watch?v=BWeQJmd ... 4OKeDCWlQb

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Winners have simply formed the habit of doing things losers do not like to do 18/03/12

On the party thing; surely you know at least one person there, or how did you get an invite?

I think for this you need to take a massive step back from pick up. There is some good stuff on this social shyness forum, so have a general browse through some threads.

But what I will say is that I think you need to change your perspective on life and friendship. You need to try and develop a more "social" mindset. You sound pretty much like how I was a while back - you've got friends, you're maybe not shy as such, you just feel more comfortable with your friends sort of thing. What you need to do, in my opinion, is WANT TO MAKE NEW FRIENDS. Want to get to know new people, want to be seen as the person who can talk to anyone. That was the biggest change in me and it helped both pick up and general social skills.

Almost picture new people as old friends - don't talk to them in a reserved manner, talk to them in a warm manner, like you'd say hi to someone you used to be close with but haven't seen for a few months. Want to know what's going on in their lives.

A lot of it is mindset I find. Sometimes even now, I wake up feeling "anti-social" and have to consciously think in my mind that today I'm going to be warm, welcoming, talkative and want to meet new people. If you can get that mindset more often, then you'll be well on the way.

That's a normal thing specially in parties. Most of the guys have girl or guy with them to accompany. But if its more like dating scene like cinema, shopping then you better do it alone.