Can I be in trouble? Unmarried relationship ended

[Minou]

Hi,
I was in a long term relationship for more than 6 years. I am an eea national and last year with my ex we applied for residence card under eu law. As a result my ex got a residence card as a family member of an eea national for 5 years. I precised that we are unmarried partners. We split in last December and since then we do not live together. I have been trying to cover since by letting bills and contract under both names but now I left the flat. She recently found a new job and i am a bit wortied about the situation as her rights to remain in uk depends on our relationship. She recently found a new job and therefore i don t know if it is risky for her as now she has no way to prove that we are still cohabiting. She also plans to travel oustide uk to visit her family and i am worried that if uk border asks where I am and worst case scenario contacts me I will be obliged to lie to protect her. Could i be accused to cover her up and be evicted myself if they find out. Please help as this is a big dilemma, i would like she remains in uk and carries on her career but at the same i do not want to be in trouble with uk government.
Thanks for replying