Well any ideas how I can counter this perspective:

"I understand that it's always hard when someone you like doesn't return your feelings. However, regardless of whether or not she's a lesbian, it does sound like she's clearly stated that she doesn't like you "that way", and it's your job now to respect that. Good on you for trying to establish a friendship with her, if you like her as a person there's no reason not to do that, but don't fool yourself into thinking that one day her feelings towards you will change. If it takes a while for you to get over her, than that's okay, if you find yourself still feeling the same way about her after a significant amount of time has passed, I think the best move would be to take a step back and not see her for a while. It's fine to be attracted to someone who isn't attracted to you in return, but once you've been rejected, so to speak, it's really just not polite to continue to pursue them romantically. So if you think you can be friends with her and really just be friends, great. But otherwise, leave her alone, you know? "

Apparently, it is impolite to desire a romantic relationship with a lesbian.

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