Love on the Line: Setting Wedding Boundaries Before 'I Do'

Navigating Pre-Wedding Friendship Tensions: When Your Partner's Best Friend Raises Red Flags
As my wedding day approaches, I find myself wrestling with a delicate and increasingly troubling situation involving my fiancé's best friend. While I want to be supportive and understanding, something about "Tyler" consistently sets off alarm bells in my mind.
The dynamic between my fiancé Mark and Tyler feels complicated, and I can't seem to shake the uneasy feeling that something isn't quite right. Their friendship, which Mark cherishes deeply, has become a source of significant anxiety for me as our wedding draws near.
I'm caught in a challenging emotional landscape: wanting to respect my future husband's close friendship while also honoring my own instincts and comfort level. The tension is palpable, and I'm unsure how to address these concerns without potentially damaging Mark's long-standing relationship with Tyler.
My heart is conflicted. I love Mark and want to build a trusting, transparent marriage, but the discomfort surrounding Tyler feels like an unresolved issue that can't be ignored.
How do I navigate this sensitive situation without creating unnecessary conflict or appearing unreasonable? I'm seeking guidance on communicating my feelings effectively and finding a resolution that respects both my emotions and my fiancé's important friendship.