Most Helpful Guy
I've been there. 2 things I'd do:
1, affirmations. 300 times a day saying: "I'm good enough"
2, every time, before you see him, think about 3 things you're greatful for. And then remember that time when you felt powerful in your life. The world was yours!! Get into that state. Feel it and live it. Adopt the posture you had in that moment and the breathing pattern for 2 mins.