How can I get over someone who flirts?

So when I told my best friend (Lara) that I have feelings for her and I am bisexual she said she doesn鈥檛 feel the same way because she is unsure of her sexuality. And she is just bi curious, she respects my sexuality and my feelings but she can be quite confusing. When I was at a party and met some guy (nothing happen) she got jealous and I ask her why. She said she was jealous of my last two boyfriends in high school and she felt afraid we won鈥檛 be close anymore if I get a boyfriend. Because she said she was being over protective. (That was last year) But the odd thing is that I been close to her when I was going out to my ex BF鈥檚. I hang with my friends with my ex-boyfriends at the same time. She flirts with me too. She comes across my personal space, she smiles with a daring look in her eyes when I look at her, mimics my body movements sometimes, lightly touches me and leans on me.

I thought to myself that I am thinking to much into it but when I told my best friend Mandy who is friends with Lara. She said that she see鈥檚 Lara flirting to me. I have the hugest crush on her for 7 years and her actions always been like this. I want to move on because when I ask her 鈥渄o you like me more than a friend?鈥?she replies 鈥渘ot as of now sorry I see you as a sister.鈥濃€?.but why does she flirt? BTW I flirt back and get close but she never backs away or stops the teasing. I am 21.

OK this is very inconsiderate of your friend Lara if she knows how you feel about her. Flirting is fun but it's not right to do it not when it is leading someone on or teasing them.