Alfie has been tipped to face temptation in the coming weeks, as lonely Roxy Mitchell (Rita Simons) realises that she's falling in love with him.
The pair are currently working together at the Queen Vic while Kat (Jessie Wallace) is away looking after her dad Charlie, who has suffered a stroke.
However, Richie told All About Soap: "As far as Alfie's concerned, he's a happily married man. He can see that Roxy is flirting with him, but he just thinks she's being friendly. They've got a great friendship and enjoy some good banter together, but Alfie banters with half of Albert Square."
Asked whether Alfie is capable of being unfaithful, the actor replied: "I hope not. Alfie's got very strong morals and I'd like to keep it that way. He has no idea that he's sending out these signs to Roxy, and there's going to be a lot of confusion between them over the next few weeks.
"There's undeniable chemistry between Alfie and Roxy, but at the end of the day, he's still married to Kat and he loves her to bits. Plus, I'm not sure whether Alfie would want to have a relationship with Roxy - she's got a lot of baggage."
Richie added that there are stories lined up for Kat once she returns to Albert Square.
He said: "I know people love the Kat and Alfie relationship, and when she's back, it'll be full steam ahead on their storyline. But I think Roxy will be in the mix there somewhere."
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Watch Alfie's EastEnders character trail in the video below: