DS is 18, he didn't get good enough grades to get into uni, so he was disappointed. All was doing since then was go out drinking and was playing Xbox constantly.
About 2 weeks ago, we had an argument as he wasn't doing his chores that he was supposed to be doing, when I spoke to him about it he told me to fuck off, I told him if he didn't learn to respect me I would stop paying for his phone (yes, I know he's 18 but I still pay for it).
He stormed out and has been staying at a mates, ive not heard from him apart from when I messaged him asking if he wanted to meet up so we could talk about what happened, he said no and ever since he's been leaving me on seen.
Today's my birthday, and I've not had a card off of him or even a message
AIBU to be a bit upset?