Unfortunately she’s just not interested in dating; it sucks, we’ve all been there. My recommendation is if you’re going to remain friends you’ve got to look at why you wouldn’t want to date her. I’m not saying that’s an easy thing to do, and it especially isn’t if you continue becoming close friends before getting over your crush on her. For me I had a crush on a girl I was friend zoned by for a couple of years. Wasn’t until we went to separate colleges that I got the space I needed to move on. Since then we’ve become close platonic friends, and I seriously value her as just a friend. She’ll never want to date me because I don’t believe in the same religion as her, and that just results in too much of a misunderstanding in terms of me not fully understanding her motivations in life. My reasoning for not dating her, she’s vegetarian (I’m actually dead serious, it’s a deal breaker).