The 29-year-old accused his girlfriend of cashing in on their love life. The two split in 2010 and Ryan was charged with assault after allegedly striking Miller.
The singer seems to have been frustrated with too much intervention in his personal life, reported Sun online.
"Twitter. Press. I hate this... I've had enough! I want to run away! Sammi (Samantha Miller) fill your boots! Join the que (sic)," Ryan wrote.
"You want the truth!!! Come on then you blood sucking people!!! All about my life!?? You wanna know! What do you want? Go on Sammi!," he added.
Ryan's messages continued for almost an hour.
"Selling my story on my abusive relationship over the last 5 years!!! All that I've been through. Sick of it! Now you'll know the truth. When someone threatens to go public with your relationship again! Let's go public!!!! Kept it to myself before!!!! Come on," Ryan tweeted.
"You can't say Sammi! Telling me your gonna sell a story as a weapon hopefully this will shut you... Up!!! Stop using who I am. I honestly couldn't care less!! Do your worst!!!! I've set it up!!! Tell me your gonna sell another story! Good! Hope all you enjoy it (sic)," he added.
Ryan has a four-year-old son with Miller.
