If this is something you'd truly like to work on, not out of a sense of guilt but because you would enjoy occasionally reciprocating, there are a wealth of resources out there for the enthusiastic amateur (you are far from the only would-be blow-jobber whose spirit is willing but gag reflex is weak). You have more options than "no blow jobs, ever" and "regular whole-hog sessions to completion that result in vomiting."

You can care very much about someone without being capable of becoming their primary caregiver in the event of their parents' untimely death.

A woman who repeatedly asks a man she knows to be gay when he's going to get married and have children is not trying to let sleeping dogs lie.

You have a wonderful opportunity here to not care about something that doesn’t matter to you. Please don’t miss out on it.

You are allowed to draw lines even if your feelings are irrational. Part of the marvelous business of being an adult human is that you get to set your own boundaries for whatever reasons you like, without appending a sensible rationale to them.

Reconciliation is not possible when one party asks the other to obliterate all signs of their relationship.

If you don't like potlucks, the solution to your problem is "don't go to potlucks," not "insist other people don't have them."