If you never love you can't be hurt. But love must go both ways and does, even just a little. So forgive him and yourself. It's not something we like, to admit we too have faults, but we all do. Make it part of what makes you you, learn from it, and go on, realizing that it might very well happen again and again and that each time you will grow. And try sharing the pain in music or some other creative endeavor. It'll help.