My boyfriend deleted my comment

i left my boyfriend a comment on his Facebook status. I'm pretty sure he deleted it because when I went back to his page later it wasn't there. He denied deleting it and said he never saw it, even though it did show up right after I posted it

so I said okay ill just retype it and left the same comment again. he kept that one. It was just a comment saying I was happy for him for getting into the school he wanted, just friendly. We recently started dating so we aren't listed as together on Facebook. I'm not sure why he'd delete my comment. should I worry? last time I left him a comment was the beginning of june and he kept that one