How long will it take me to get over my ‘ex’ girlfriend?

I'm sorry for the crap you are going through... doesn't sound fun! You gotta think of it for yourself, not for the two of you. Why would you want someone who lied to you for sooo long? Someone who although may have been great awhile ago, completely changed? Cut off all ties with her... and if she is persistent, tell her you aren't just going to wait around. Everything will work out over time. My ex, who i dated for 3 years, broke up with me in the middle of March. I am no where near over it... but I know in time I will be! Good luck buddy!!