I wet my bf's bed, how do I reduce the embarrassment?

I have an embarrassing problem, that i'm almost too embarrassed to ask you all about.

Last night I stayed at my boyfriend's house, we've been together 2 and a half years. I woke up to discover I had wet the bed. I was absolutley mortified, as I haven't done this since childhood. Obviously I was very upset and my boyfriend said not to worry about it and acted ok about it. He was very sympathetic, and told me to forget about it. But i'm so worried he it's changed how he's seen me, from his girlfriend he wants to have sex with to some weird child like girl that wets the bed. I feel so disgusting. Its bad enough that I'm 20, and I wet the bed, let alone it was when I was with him!!
I know this is a strange question but if he has changed how he see's me, what can I do to change it back to how it was? How can I forget about this? I'm MORTIFIED