You can lose friends and annoy others. Tell others, but don't carry it with you throughout the conversation. Just bring it up. Let others know that you're proud without pushing the subject. There are many other accomplishments one can be proud of, like being a good friend.
Actions do speak louder than words.
Another instance is if you just won a medal in gymnastics. I just won an award that says I am. The best thing to do in this case is let the others bring it up. Let them congratulate you. After that, change the conversation to a different topic.