Pink Triangled

When a guy falls for a female only to then find out she is lesbian. This is especially the case when the chemistry between the pair in question is seemingly quite strong.

Devon: Yeah so after she took me out to china town for lunch, studying in her room, and doing a yoga class together...she told me she was a lesbian.
Arthur: That's harsh man
Devon: I was totally pink triangled! I haven't felt this close to a girl in years!