The businesswoman, 24, opened up about her relationship heartbreak - and claims it was her Olympian ex-boyfriend who decided to end things.
The former TOWIE star turned fitness entrepeneur told The Sun's Fabulous magazine that although she was happy, Louis just stopped contacting her after a holiday to Thailand.
According to the magazine, Lucy fought back tears as she spoke.
She says: "What makes it harder is that there wasn't a massive big thing that happened. There was no cheating, no big scandal. We were very happy and everything was going the way it should. It felt like 'it' to me."
The couple went their separate ways in January after just over a year together, and Lucy admits the decision was all Louis'.
Claiming cracks started to show during a holiday to Thailand, she adds: "When we got back from Thailand, I just didn't hear from him after we landed. We got back and it was obvious that for him it was done. [...] I'm someone who tries to fix things, but there was no chance to do that. After Thailand, that was it."
She also admits she was "really hurt" when Louis posted a message on his Instagram account about their split and a less than flattering comparison to a Kylie/Tyga pic.
Lucy Mecklenburgh (@lucy_meck) March 27, 2016
Lucy now admits the split was for the best, and reveals she has blocked Louis on social media.
And, despite rumours of a rekindled romance with ex-Mario Falcone, Lucy says she is single for now...
...But we doubt she'll stay that way for long.
The boutique owner and new face of Barry M cosmetics shared a SIZZLING new selfie on Easter Sunday with her 1.63million Twitter followers.
Alongside a photo in her workout gear - those abs though! - she wrote: "Early Easter work out to make it acceptable to eat a load of chocolate today."
She's a girl after our own hearts... (Except the early morning gym bit).
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