He is your boyfriend for 4 years. He cheated many times behind your back but everytime you confront him, he always manipulate you that you can't satisfy him despite your effort to please him.You had it enough until one day, you decided to end things.

"It's not even my fault that it comes to this. You can't please me so you should realise that you need to work on yourself ! You want to end our relationship of four years just bcus I'm cheating ? You need to realise that just because I'm cheating doesn't mean i don't love you anymore"