Some feedback. Ok.
I think your life would be better if you stopped playing phone games, stopped obsessing about what your ex is doing, and stopped behaving in a way that you yourself think of as acting like a loser.
She’s gone. You’re going to still be thinking about her, but practice thinking about her in the past tense. Don’t contact her, don’t contact your friend for about a year or so, delete her on facebook and whatever, and if you see them around just say hi and walk the fuck on. They have nothing to do with you now. It’s time for the next chapter in your life.
Should you let go? A thousand times yes. Good luck.