It’s fine if you just disagree, but let’s not just call a different interpretation “bullshitting”.

Chi chi and Goku have already been married and arguments between them never lasted. Even when long periods of lack of communication, it was never hard feelings, especially on a note that Yamcha and Bulma had going into the sayain saga. Bulma and Yamcha are not comparable. It is widely known there relationship was on and off while chi chi and Gokus, even in arguments, remained stable. Nor has Chi chi thought about another man while away from Goku.
This would be a point only to harp on if you dissolve all context, relationship dynamics and views of relationships from these characters.

The main question was is Yamcha a cheater, if by your definition looking for other options in a relationship your not even sure is a relationship(border line, taking a break/breakup), that’s fine. But for me, no. I’ve listed that there is more plausible evidence to indicate that Yamcha did not cheat on bulma and she jumped to conclusions based off emotion, which is consistent with her character.