There's no way texting 'I love you' could make the situation any better.
There's no way she'd fall for pathetic moments of desperate needs for love. Like every girl she too wants someone who can have her on a leash, not the other way around. She wouldn't feel bad because she's a stupid girl who has no idea what's doing since she's in that silly age.
Just chilling and ignoring is the best way to go, even if it's the hardest.
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Indeed, what a pussy.