Re: As good as it gets .
Buster, first off your post isn't self pitying. You are airing some very authentic and relevant feelings regarding your partner and how you feel about your relationship with her. Saying she has wasted her life with you is a particularly cruel and unnecessary thing to say. You could reverse that and throw it back at her but my money is on you being too decent a bloke.
I'm assuming she knows about how alcohol affects you. If so, she should be considering your feelings regarding any party, not to mention inviting all your old mates. The expectation for you to get drunk would weigh heavily, especially as they know nothing of your anxiety. Unless of course you told them but then you run the risk of the blank looks, the platitudes about getting a grip etc. Anxiety does indeed impact hugely on our lives, which to reiterate, your partner really should understand. I'm not sure how you can get out of this bash she wants. You say she deserves to be happy, well yes but so do you. And if she really respected you then she would work with you and not against. You deserve better mate, much better. Look after yourself.
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'It was a wedding ring, destined to be found in a cheap hotel, lost in a kitchen sink, or thrown in a wishing well' - Marillion, Clutching at Straws, 1987