The sod him and sod them, rise above it in public ( you can be sad about it at home). Train, train and train again, they don't matter, they aren't worthy of you, you are better than this. Release the anger, it's hurting you not him, find something to punch at home and punch it out. Smile when you are training, you have a secret...you are better than him both as a person and you will soon be a better martial artist. From one female to another, GO GIRL! You can do this.