So I have a plate, there's more history than just a normal plate (we talked about dating seriously pre-RP swallowing) but never did it seriously due to beta actions on my part pushing her away. Its been almost a year and she has noticed changes in me and we've been hooking up.

Except now she has started asking if I'm dating other girls, and not wanting to lie, I give the classic, "Yes, aren't you dating other guys?" To which she says she is, but not hooking up with them (bullshit but whatever). Now, she obsessively asks questions about the other plates - then gets jealous when I crack and say something about them or say "I'm busy tonight" - which in her mind immediately means I'm hanging out with another plate.

It came to a head last night when I had cracked and said I was hanging out with another girl. Right about 8:30 she starts blowing up my phone with texts. Every ten - twenty minutes until 10:45 ish to which her last comment was something along the line of, "I wonder what your girl thinks about your phone going off." I'm not stupid enough to have the notifications audible, but the phone lights up when I do get a text if, say for example I'm in a dark room and my phone is on the nightstand.

How do I handle this behavior?

edit: As a result of last night I have been running soft dread game. I didn't reply to any of the texts.