Viewers of the Essex reality show saw Grace in tears on Sunday night after Lewis appeared to give her the cold shoulder ahead of his boxing match.
It was a stark contrast to earlier in the episode when they'd been flirtatious with each other in a dance studio where Grace had been helping Lewis work on his balance.
Grace was in tears as she told her friend Georgia she felt "mugged off" by Lewis, especially as he'd been the one who'd initially put the moves on her.
But chatting to the TOWIE official website after the episode, Lewis explained why he'd acted as he did.
Lewis said that not only was he concentrating all his energy on the boxing match, which took place at the weekend, he just didn't see a spark between him and Grace right now – although he likes her and thinks she's a pretty girl.
"What do you do in that sort of situation? Do you carry on, keep thinking maybe eventually the feelings will kick in? It's not fair. I think maybe the feelings could eventually kick in, I don't know her well enough, but at the minute I'm sitting there looking at her, I see she likes me, and I don't think it's fair I continue to walk her up the garden path."
He added: "If I kiss her, sleep with her, then tell her I don't know, that's not fair. I think she probably thinks I was being quite annoying and short but I'm trying not to be selfish."
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