One thing that never really helped me was being told 'just relax', you can't force yourself to relax! I would say, accept your shyness is there, accept the fear and reseverations you feel, don't try and preten to yourself you dont, but force yourself to try and socialise anyway. I used to hate blushing so much, eventually i just had to accept that I am someone who blushes and its not the end of the world (My sister does, My son does its a family thing). So I'm a shy person, doesn't make me a freak. Better shy than loud and obnoxious! Most people would prefer a shy person over an arrogant one so you are on to a winner!
Being in my mid-thirties now and still suffering from shyness all I would say it does get better. This comes and goes now, if I'm happier with life I'm ok and at times actually quite confident but if things aren't working for me I can slip back into being very shy and self aware but thats just the way I am, its just part of me.
I say this because I just had to give a presentation about 30 minutes ago, I told my boss, "just so you know, I hate these, I'll do it, its part of my job but it will be 15 minutes of ritual humiliation." He said "come on you'll be fine" (he is supportive and a really good bloke) but I said "it wont, but I'm used to it being bad, I just want to set your expectations!". So I gave it a go and the first 5 minutes I shook, I blushed my voice was everywhere and then I relaxed a little and by the end I was ok. The reason it got better was I knew it would happen and I just had to get on with it, I didn't panic, thats key. But still really glad its over now ha! Its frustrating as hell though I'm thinking christ all i have to do is talk, why does my brain desert me!? But what was the outcome, a few people saw me looking nervous and I live to fight another day. Thats the approach I would try and take, dont try and fight it and pretend its not there, just refuse to let it dictate your life.