My straight friend is in love with me

So I'm a gay guy, pretty obvious upon meeting me, and I've been hanging out with this straight girl for a few months. I really like this friendship, we got along really well, but I only like her as a friend. Over the past few months she's been flirting with me and making advances but I ignored them. Last night she randomly starts texting me asking what our relationship is. I say "friends" and she got upset. She then called me and told me the only reason we hung out so much and was so nice to me was because she was in love with me. I told her it's ok and that I don't think that it's weird but I just wanna remain friends. She then told me if we were to remain friends she wouldn't be as nice to me or see me as often. I honestly feel kind of betrayed because I really enjoyed the friendship but I guess she only wants to see me if we're in a relationship. Advice? Thanks TL;DR: I'm gay and my straight friend was in love with me. I told her I like her as a friend and she said the only reason she was so nice to me in the first place was because she was in love and she said she's probably not going to be as nice to me now. I still want to be friends though.