After I have read your posts for a long time here I am writing one for myself!
My situation:
I have been residing in the UK (legally) since August 15 2006.
Initially came here on a Tier 4 General Student Visa.
Got married in April 2013 with an EEA National. Our marriage didn't last long for various reasons.
Separated almost 14 months ago (she is still in the UK and working) we have remained in amicable terms.
I currently live with my actual GF who is British, been living together for 1 year now.
Never bothered to divorce with my EEA spouse as no one of us had the money to go through with it besides didn't want to complicate my life!
Bad news:My ex EEA told me that she has applied for jobs in her home country recently and she is planning to leave UK permanently (as is stands now) in February/March next year! Which is only a month before we complete 3 years of marriage (not considering the divorce timings).
Also this is only a few months before I complete my 10 years of legal residency

I wonder what my options are in here now?
Thanks for your time guys, what you do here is amazing

Regards
Leo