don’t worry about it! Who gives a damn about what these people say, seriously. The only way for it to be embarrasing for you, is if you get it to you. If people say, ignore it. If they continue to say shit, then say you don’t like him anymore anyways.
And as for being hurt - once again, you’re going to be okay. You will come across to plenty of breakups & rejection. You just need to stand up to yourself & say “fuck it. I don’t need him . I’m a beautiful girl & I will soon enough find the right guy” Yes, it will be hard for you to cope with moving on from him & all that, but you will eventually get over him don’t worry. Just try and be positive about it all, k?