I know this guy, we're not that close but we have some history together. We went to the same college where we hung out as undergrads and we ended up in Seattle together for work. We'd meet up to catch dinner or to watch our school's basketball games and stuff like that. I invited him to my birthday dinner celebration last month, but he recently had his and he purposely did not mention anything about it to me. I know he has a different crowd of friends that he hangs with, but I hung out with him just the day before his birthday (I didn't bring up the topic on purpose even though I knew it was his birthday tomorrow) and he never said a thing. I am a little perplexed why. Has anything like this happen to you? I don't think he hates me or anything, but why would he not want me there?