[ Kirk was quiet, listening to her as she laid out, trying to sort it all. He was quiet a bit longer after she finished speaking, but finally he began to speak. ]
Then stop doing it. I know they're your friends, Felicity, and you care about them, but you can't try and be four different things for four different people. It's not possible, and it's unfair. Just as they are themselves, so are you yourself, with your unique experiences and memories and feelings. Stop trying to please them or be what they expect and just be you.
As for Oliver - I agree with your sentiment that even though you personally had something with him in your time, if this Oliver has not and does want that, you need to respect that. I don't think that's reason for you to ignore your feelings, though.