if you're cuck - try to apologize for 'something' and persuade by any means to chat with you again
if you have some pride - just wite 'wtf is going on here' but in more appropriate words or just leave her alone
Lol yeah I'm 27 I experienced it all. Dating at 18 or under is emotional rollercoaster. Especially nowadays so many broken girls with daddy issues, it gets better when you get older and shut off such shitty behaviour right away.