Back in February, Nicole confirmed she and Lewis had "mutually decided" to end their relationship. At the time, the couple never revealed the reasons behind the break up, but now Nicole has said she is learning to let go of the past.
Opening up on The Wendy Williams Show recently, Nicole explained: "Everything happens for a reason. I'm a girl of faith and a strong believer, and seven years was a long time.
"Whatever you experience in life and relationships, you're obviously meant to grow from it and learn more about yourself... I'm still learning so much.
"There's a quote by Buddha that I like to live by and it says, 'in the end three things matter, how much you love, how gently you live and... how gracefully you let go of the things that are not meant for you' - that's really important. You have to know... things are working for you not against you or at you."
Having spent the last seven months single, when asked if she was dating anyone new, the former X Factor judge suggested she wasn't, replying: "I'm rubbish at dating."
However, since her split with Lewis, Nicole has been linked to Swiss footballer Pajtim Kasami and 'Thinking Out Loud' singer Ed Sheeran.
It was reported she and Ed had enjoyed a series of dates, but dismissing any rumours of romance, Nicole seemed to find them funny instead.
She revealed she and Ed had actually "taken the mick" out of such reports, faking the pair's break up on Instagram. Nicole said: "It had been going on for so long, and Ed and I are good mates so we decided just having fun and taking the mick... We thought it was quite clever of us."
Lewis, meanwhile, has been linked to Gigi Hadid, Kendall Jenner and most recently Rihanna.
The Formula One ace and Nicole had enjoyed an on/off relationship for seven years, before deciding to call time on their romance for good.
Following the split, Nicole said it was "one of the hardest decisions" she has ever had to make, but her and Lewis decided together it was best to go their separate ways.
Reports suggested the pair split because Lewis wasn't ready to marry and start a family but Nicole was, although, neither have confirmed if this is true or not.
Instead, Nicole has said she is now focusing on a "new chapter in her life", while Lewis publicly told his former flame he would always be "thankful" for the time they had together.
He said: " Through the years we shared a lot, I wouldn't have changed a thing. All the experiences made me the man I'm proud to be right now. The memories together will never be taken away no matter how old we get and I'm thankful for the time we had."
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