You say you didn’t make an impact on her life. You say you feel like if you left, they wouldn’t be any different and nothing would change. You’re being ripped apart inside because you see her falling for someone else and it’s more than you can handle. I know where you’re coming from. Believe me, i really do. But you know what? You’re wrong about one thing. You did make a difference. I know you did, and YOU should know you did too. You’ve done everything right. You’re not at fault. You’ve given your all. It’s not your fault, don’t blame yourself.