@ButtWorldsMan
"A better vibe with guys" That's called being attractive.
"Never kissed or had sex." This is possible, but highly improbably given that neither are asexual.
I'm not surprised at any of this. Females will be females.
I'm also not saying he should tolerate this either.
@ButtWorldsMan A motive to commit fornication, avoidance on the part of the second party, evidence of romantic interaction normally associated with a sexual partner... Occam's razor says she's unfaithful to OP.