I have the same problem as you, OP.

I didn't realise it really till this weekend but I'm only really any good at this when with a few select friends (the ones who get it).

Most of my friends no nothing of me trying this whole PUA thing but they have noticed I've been meeting a load more women and having been commenting and joking about it. Of course, I joke with them about it but feel the added pressure when around them and this is where most of my approach anxiety comes from, I think.

All the replies have been extremely useful.