Lots of variations on "just ignore it" here, but that's harder than it sounds. Chances are you are hoping for positive acknowledgement when sharing something you're excited about, only to be rejected by the one upper. There's nothing wrong with wanting to share things, but you do have to know your audience. If the person you are talking to is an asshole, keep your expectations low. Save that stuff for your cool nice friends with basic human decency who will make you feel good about yourself instead. It's also not the easiest thing to admit to yourself that someone you thought was your friend, turns out to need special distance because of immature tendencies.