He tweeted: "I trust her with all my life."
Geordie Shore doesn't have the best track record when it comes to their stars maintaining relationships on the show, and to make things slightly awkward, Marnie will be returning to the house to live with her ex-boyfriend Aaron Chalmers for several weeks.
They'll be cut off from the outside world and Marnie won't have her phone, meaning she has no means of contacting Lewis - but he's not worried.
Taking to Twitter, Lewis revealed that Marnie begins filming in just a couple of days and admitted he is going to miss her.
He tweeted: "I trust @MarnieGShore with my life & all of my heart. My girl goes away tmw for two weeks and i am going to miss her badly... (sic)"
I trust @MarnieGShore with my life & all of my heart. My girl goes away tmw for two weeks and i am going to miss her badly...— Lewis Bloor (@lewis_bloor) November 11, 2016
His comments come after Marnie recently hit back at her co-star Scotty T, after he claimed Marnie would 'cheat' on Lewis in the house. Scott had told Star magazine: "Put it this way, she was getting with Aaron, she went in Big Brother, she got with someone else. She's going in the house with Aaron, she's going to get with him. It's just the way Marnie's brain works."
Marnie, meanwhile, was not impressed by his comments. She hit back at Scott in an interview with Daily Mail and said: "It made me so angry that Scott said that. We aren't talking because of it."
"I understand if people would say it because of the past, but it's the fact that it's coming from Scott Timlin who's the biggest cheat," she claimed. "I can't remember the last time he was faithful, so I find it very ironic and rich coming from him and it made me really angry."
When contacted by Reveal, a rep for Scott declined to comment.
Marnie, meanwhile, added that she "isn't looking forward" to filming again, but is glad to have the other girls in the house with her. Speaking about Lewis, she said: "Lewis is not worried about Geordie Shore. He knows me."
Fans have previously seen Marnie film in the house with a boyfriend, but her relationships haven't always worked out as a result. Insisting that won't be the case this time round, during an appearance on Loose Women, Marnie said: "I haven't cared about anyone like I do about Lewis."
She and Lewis met while starring on CBB this summer and while they both have admitted their romance has been "difficult" since leaving the house, they still seem pretty loved-up.
In fact, Marnie recently hinted that she wants to marry Lewis. She told her Instagram followers: "He's the kind of magic you marry."
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