Sometimes, shit happens! Someone might be mad at you because they misinterpreted something you said. Sometimes they might be mad because you screwed up. Or they might just be jealous of you.
Either way, you just need to accept it and move on. Be the bigger person and apologize for the situation. Then, spend little time dwelling on it and wait for them to come around(warning, they may not come around at all).
But whatever you do, don’t let them change who you are to please them. You can’t give them that power.
Never stop believing in yourself. Talk to you soon 🙂