There's nothing odd or wrong with a "sexless marriage" as a marriage becomes seasoned, Michael. Lots of married couples have this arrangement to some degree. In fact, a lot of married couples have even stopped sleeping in the same bed or even the same bedroom. The important question regarding this trending development is
whether both parties are happy & comfortable with this arrangement. After 10-15 years of marriage, sexual boredome occurs and the marriage run aground because sex has become too routine, predictable, repetitious patterns, or health of one of the spouses, etc. I know my dad sleeps in a different twin bed than mom because he has sleep apnea and wears one of those breathing masks.
Assessments:
According to your profile, you are bi-sexual. Were you bi-sexual when you got married to your current wife? Did SHE know you were bi-sexual
before your marriage? Did you notice any changes in your wife's desire for sex after she learned you were bi-sexual? Do your friends know you're bi-sexual; to me this is something I think would be highly confidential in a marriage.
You say you're athletical, how is your wife's health? How's her appearance & weight compared to her wedding day?
These might be cosmetical, but could be a killer for romance.
At any rate, a sexless marriage can be an issue when ONE party of the marriage isn't happy with that arrangement. Are the two of you into swinging or 3-somes? Has she been with other men since marrying you?
Sexless Marriage & Divorce: When to Walk Away (2021 Guide) (onlinedivorce.com)
Sexless Marriage or Relationship: What Causes It and How to Fix I (healthline.com)
And no one knows about that at this point 
