Let's face it. That's a reality slap. But you need to wake up in your trance and fantastical "what ifs".
Love doesn't only show when you're in front and together. When love is true, it's like the light that pierces through even behind your back, and love is truest when it fights for you.
It will be the hardest because your heart is already familiar with his love. But, again, he chose not to fight for you and defend you behind your back.