It is not bad to be proud of your accomplishments, pat yourself on the back, let people know you’ve done something great. On the other hand, it is exhausting to be around someone who is constantly doing this.
I have a friend who brags about herself and her kids literally every single time she speaks to someone. Anything someone else does, she or one of her kids has done better. Our entire group of friends has distanced themselves. If I have to hear how her son is the most brilliant, her daughter is the most stunning or any number of the things she thinks of herself one more time I think I might lose it. We used to be very close, now we barely speak.
@perspicacious got it right – you’ll ultimately lose friends if you really have a problem with it.