The worst personality trait ever

I've dealt with aspergers pretty well most of my life, like normally you couldn't tell, but right now I feel *bleep*ing awful. See, my girlfriend is playing a gig tomorrow night and I'm really happy for her, but she wants me to come and watch, and haven't said yet but I don't think I could handle it on my own. I also don't want to ask anyone else to come with because to me it sounds pathetic to say "Hey can you come with me to this gig because I'm too *bleep*ing anxious despite it being my girlfriend playing and I'm supposed to be supportive".