Aha - the bit that must have stuck in my mind was that her friend knew him, rather than her meeting him on Bumble. Now it makes sense! That video was really telling in quite a few ways, looking at it again.
For a start I don't think that she's on good terms with Maff. Considering how unhappy they were, even before they got married, and then how it ended, I don't see how they could be. She's just trying to be the 'cool girl' by seeming understanding and reasonable but her tone is bitter. She seemed more concerned with the fact he left shortly before Christmas, rather than the fact he actually left. Like, 'how could he ruin Christmas by leaving me', not 'I've lost the man I loved enough to marry only a few months after we made a legally binding commitment to each other'. She was very concerned getting back out there quickly in order to feel validated by men fancying her again. This is the reason she will stay with Phil, rather than be on her own. She needs the validation - her sense of self comes from men finding her attractive and when she's single she feels 'lesser' in some way.
She really should have stayed single after Maff left and got some counselling to work out why she stayed with (and married) someone who clearly wasn't that into her and who she wasn't happy with. There's plenty of other stuff she could work out while she's there too. But working through things and facing up to unhealthy coping behaviours is difficult and takes work, which isn't for our Helen, is it?